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descends is not well understood but it seems to be associated with the shortening of the gubernaculum. This is attached to the testis and extends through the inguinal canal to the wall of the scrotum as a testis. It carries with it the ductus deference, which are testicular vessels and nerves, a portion of the abdominal muscle, and lymph vessels. All of the structures remain attached to the testis and form what is known as the spermatic cord. By the time the testis is in the scrotal sac, the gubernaculum is no more than a remnant of scar like tissue.
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genitalia. This is caused by the androgens produced and secreted by the testes. Androgen induced development causes the elongation and differentiation of the phallus into a penis, a fusion of the urogenital folds surrounding the urethral groove along the ventral surface of the penis, and a midline closure of the labioscrotal folds. This closure forms the wall of the scrotum the external genitalia. The external genitalia are completely formed by the end of the 12th week.
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662:. This structure attaches to the inferior portion of the testis and extends to the labial sacral fold of the same side at the same time, a portion of the embryonic mesonephric duct adjacent to the testis becomes attached and convoluted informs the epididymis. Another portion of the mesonephric duct becomes the ductus deferens.
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organs and external genitalia will be male or female. This sequence is understandable in light of the fact that both male and female embryos develop within the maternal environment - high in estrogen secreted by the mother's ovaries and the placenta. If estrogen determined the gender, all embryos would become feminized.
863:. This occurs when one X chromosome contains a segment of the Y chromosome, which was inserted into the X chromosome of the father's sperm. Rarely females are born with the XY genotype. They are found to be missing the same portion of the Y chromosome as was inserted into the chromosome of XX males. The gene for
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of the paramesonephritic ducts 60 days after fertilization. Testosterone secretion by the interstitial cells of the testes then causes the growth and development of the mesonephric ducts into male secondary sex organs. The MĂĽllerian ducts atrophy, but traces of their anterior ends are represented by the
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Internal accessory sex organs to develop and most of these are derived from two systems of embryonic ducts. Male accessory organs are derived from mesonephric (wolfian) ducts. The developing tubules within the testes secretes a polypeptide MĂĽllerian inhibition factor (MIF). MIF causes the regression
704:
The genetic sex is determined by whether a Y bearing or next bearing sperm fertilizes the open; the presence or absence of a Y chromosome in turn determines whether the gonads of the embryo will be testes or ovaries; and the presence or absence of testes, finally, determines whether the sex accessory
960:
After the testes have differentiated, male sex hormones, called androgens, are secreted from interstitial cells (cells of Leydig). The major androgens secreted by these cells is testosterone and secretion begins 8 to 10 weeks after conception. Testosterone secretion reaches a peak at 12 to 14 weeks,
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The masculinization of the embryonic reproductive structures occurs as a result of testosterone secreted by the embryonic testes. Testosterone, however, is not the active agent within these organs. Once inside the target cells, testosterone is converted by means of an enzyme called 5α-reductase into
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The descent of the testes to its final location at the anterior abdominal wall, followed by the development of the gubernaculum, which subsequently pulls and translocates the testis down into the developing scrotum. Ultimately, the passageway closes behind the testis. A failure in this process can
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or an infantile hydrocoele. The testes descend into the scrotal sac between the sixth and 10th week. Descent does not occur until about the 28th week when compared to when canals form and the abdominal wall provides openings from the pelvic cavity to the scrotal sac. The process by which a testis
405:
The epididymis is a long whitish mass of tightly coiled tube. The sperm that are produced in the seminiferous tubules flow into the epididymis. During passage via the epididymis, the sperm undergo maturation and are concentrated by the action of ion channels located on the apical membrane of the
854:
Chromosomal abnormalities can occur during fertilization impacting the development of the male reproductive system. The genotype of the male consists of a Y chromosome paired with an X chromosome. Female sex is determined by the absence of a Y chromosome. Some individuals are male who have the
683:
The external genitalia of the male is distinct from those of the female by the end of the ninth week. Prior to that, the genital tubercle in both sexes is a phallus. The urethral groove forms on the ventral surface of the phallus early in development during the differentiation of the external
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At six weeks post-conception, the differentiation of the external genitalia in the male and female has not taken place. At eight weeks, a distinct phallus is present during the indifferent stage. By the 10th-12th week, the genitalia are distinctly male or female being and derived from their
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The embryonic and prenatal development of the male reproductive system is the process whereby the reproductive organs grow, mature and are established. It begins with a single fertilized egg and culminates 38 weeks later with the birth of a male child. It is a part of the stages of
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At birth, the development of the prepubertal male reproductive system is completed. During the second trimester of pregnancy, testosterone secretion in the male declines so that at birth the testes are inactive. Gonadotropin secretion is low until the beginning of puberty.
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in the developing male. Before seven weeks after fertilization, the gonads have the potential to become either testes or ovaries. Reproductive sex organs for both male and female are derived from the same embryonic tissues and are considered homologous tissues or organs.
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The seminal vesicles form from lateral outgrowths of the caudal and of each mesonephric duct the prostate gland arises from an Indo dermal outgrowth of the urogenital sinus the bulbourethral glands develop from outgrowths in the membrane-like portion of the urethra.
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Genetic sex determines whether the gonads will be testes or ovaries. In the developing embryo if the testes are developed, it will produce and secrete male sex hormones during late embryonic development and cause the secondary sex organs of the male to develop.
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During puberty, increased gonadotropin secretion stimulates a rise in sex steroids creation from the testes. The increased secretion of testosterone from the testes during puberty causes the male secondary sexual characteristics to be manifested.
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External distinctions are not observed even by the eighth week of pre-embryonic development. This is the indifferent stage during which the gonads are relatively large and have an outer cortex of primitive sex cords and an inner medulla.
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and declines to very low levels by the end of the second trimester (about 21 weeks). Levels are the barely detectable 4–6 months of age postnatal. High levels of testosterone will not appear again until the time of puberty.
696:
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The observable, visual differences become apparent between male or the female reproductive organs are not seen initially. Maturation continues as the medial aspect of each mesonephros grows to form the
871:(TDF), is located on the short arm of the Y chromosome. The presence or absence of the Y chromosome determines whether the embryo will have testes or ovaries. An abnormal number of sex chromosomes (
420:
The vas deferens, which is also known as the sperm duct, is a thin tube approximately 30 centimetres (0.98 ft) long that starts from the epididymis to the pelvic cavity. It carries the
317:
The scrotum is a sac of skin that hangs behind the penis. It holds and protects the testicles. It also contains numerous nerves and blood vessels. During times of lower temperatures, the
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gives it a wrinkled appearance; when the temperature increases, the cremaster and dartos fascia relax to bring down the scrotum away from the body and remove the wrinkles respectively.
1108:
Sharma S, Hanukoglu A, Hanukoglu I (2018). "Localization of epithelial sodium channel (ENaC) and CFTR in the germinal epithelium of the testis, Sertoli cells, and spermatozoa".
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At nine weeks, male differentiation of the gonads and the testes is well underway. Internal changes include the formation of the tubular seminar Chris tubules in the
120:
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FORD, CE; JONES, KW; POLANI, PE; DE ALMEIDA, JC; BRIGGS, JH (Apr 4, 1959). "A sex-chromosome anomaly in a case of gonadal dysgenesis (Turner's syndrome)".
615:, and the other embryonic structures differentiate into the external genitalia. In the absence of testicular secretions, the female genitalia are formed.
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Sharma S, Hanukoglu I (2019). "Mapping the sites of localization of epithelial sodium channel (ENaC) and CFTR in segments of the mammalian epididymis".
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Specialized primordial germ cells are forming and migrating from the yolk sac to the embryonic gonads during week eight and nine. These are the
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A.—Diagram of the primitive urogenital organs, from 'Diagrams to show the development of male and female generative organs from a common type'
483:. The development of the male reproductive system coincides with the urinary system. Their development can also be described together as the
96:
1917:
Fauci, Anthony S.; Braunwald, Eugene; Kasper, Dennis L.; Hauser, Stephen L.; Longo, Dan L.; Jameson, J. Larry; Loscalzo, Joseph (2008).
1756:
Swaab DF, Garcia-Falgueras A (2009). "Sexual differentiation of the human brain in relation to gender identity and sexual orientation".
295:) become filled with blood. The arteries of the penis are dilated while the veins are compressed so that blood flows into the erectile
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921:. The genital ridge continues to grow behind the developing peritoneal membrane. By week six, string-like cell congregations called
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387:, and synthesize and secrete androgens that regulate the male reproductive functions. The site of production of androgens is the
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form within the enlarging genital ridge. Externally, a swelling called the genital tubercle appears above the cloacal membrane.
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This article is about the human male reproductive system. For the male reproductive systems of other organisms, see
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from the primary sex cord. Developing on the outside surface of each testis is a Phibro muscular cord called the
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will develop. A sperm cell carrying a Y chromosome results in an XY combination, and a male child will develop.
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1542:"A gene from the human sex-determining region encodes a protein with homology to a conserved DNA-binding motif"
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340:, vein and nerve bound together with connective tissue passes into the testis through inguinal canal.)
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Forest MG, Cathiard AM, Bertrand JA (July 1973). "Evidence of testicular activity in early infancy".
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Three accessory glands provide fluids that lubricate the duct system and nourish the sperm cells.
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17:
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Corbier P, Edwards DA, Roffi J (1992). "The neonatal testosterone surge: a comparative study".
1340:"Hydroceles and Inguinal Hernia: Symptoms, Diagnosis & Treatment - Urology Care Foundation"
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459:: a gland located below the bladder that produces seminal fluid and helps regulate urine flow.
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Cross-section of the human male reproductive system, showing the structure around the scrotum
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Knowledge (XXG) articles incorporating text from the 20th edition of Gray's
Anatomy (1918)
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Rediscovering
Biology, Unit 11 - Biology of Sex and Gender, Expert interview transcripts,
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the dihydrotestosterone (DHT). DHT mediates the androgen effect in these organs.
1884:. Medical Gross Anatomy Atlas Images. University of Michigan Medical School. 1997
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structures. At 16 weeks post-conception, the genitalia are formed and distinct.
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Image showing innervation and blood supply of the human external male genitalia
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1966:
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1618:(4th ed.). Philadelphia: Churchill Livingstone/Elsevier. pp. 307–9.
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The scrotum remains connected with the abdomen or pelvic cavity through the
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chromosome pairs, both the female (XX) and male (XY) versions of the two
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containing either an X or Y chromosome. If this sperm cell contains an
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156:. These organs are located on the outside of the body, and within the
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2017:
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Schoenwolf, Gary C. (2009). "Development of the
Urogenital system".
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that are located in the interstitium between seminiferous tubules.
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occurs because sinuses within the erectile tissues of the penis (
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1995:
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1939:
1902:. Whitehouse Station, New Jersey: Merck Research Laboratories.
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contracts and pulls the scrotum closer to the body, while the
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Secondary development includes the increased activity of the
581:
The structures are masculinized by secretions of the testes:
819:
along with the darkening of the skin in the scrotal region.
700:
Chart of the generalized male reproductive system embryionic
695:
973:
of the male), while their terminal fused portions form the
1921:(17th ed.). McGraw-Hill Medical. pp. 2339–2346.
1673:
1193:
1465:
Child and
Adolescent Development: An Integrated Approach
772:; adult males are taller than adult females, on average.
891:. Other less common chromosomal arrangements include:
3484:
1899:
The Merck Manual of
Medical Information; Home Edition
1785:"Embryology, Mullerian Ducts (Paramesonephric Ducts)"
883:- two X chromosomes and a Y chromosome are present,
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3120:
3111:
3040:
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2884:
2816:
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2715:
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2600:
2477:
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2113:
1986:
1977:
114:
102:
90:
78:
66:
61:
56:
39:
1228:"Differentiation of the urogenital sinus in males"
485:development of the urinary and reproductive organs
226:External male genitalia; a human penis and scrotum
1540:Sinclair, Andrew H.; et al. (19 July 1990).
1491:
1489:
1839:Van de Graaff, Kent M.; Fox, Stuart Ira (1989).
1407:
1395:
1380:
1326:
1282:
1270:
1214:
1791:, Treasure Island (FL): StatPearls Publishing,
1845:. Dubuque, Iowa: William C. Brown Publishers.
2776:
1951:
1103:
1101:
383:by meiotic division of germ cells within the
299:under pressure. The penis is supplied by the
8:
1457:
1455:
1453:
1451:
1449:
1447:
1296:"Differentiated stage of the male genitalia"
723:Male secondary sex characteristics include:
453:that secrete many of the semen's components.
249:, an enlarged bulbous-shaped tip called the
1246:"The external genitalia, indifferent stage"
210:The corresponding system in females is the
195:in the female's body; the fertilized ovum (
3117:
2813:
2804:
2783:
2769:
2761:
2179:
1983:
1958:
1944:
1936:
1919:Harrison's Principles of Internal Medicine
45:
1783:Wilson, Danielle; Bordoni, Bruno (2024),
465:: add fluid to semen during ejaculation (
1866:. New York, New York: Harper & Row.
1842:Concepts of Human Anatomy and Physiology
355:
347:
257:for protection. Inside the penis is the
3491:
1097:
996:
836:Sex chromosomes in XO sex determination
577:Other embryonic reproductive structures
1824:This article incorporates text in the
912:* w, w. Right and left Wolffian ducts.
131:
36:
1860:Elson, Lawrence; Kapit, Wynn (1977).
800:and chest; shoulders wider than hips.
27:Reproductive system of the human male
7:
879:- a single X chromosome is present,
611:The prostate gland derives from the
981:. This is due to the production of
272:. Both substances exit through the
152:that play a role in the process of
25:
1248:. Human Embryology: Organogenesis
528:Sexual identity is determined at
163:The main male sex organs are the
3494:
1818:
1723:Arch Int Physiol Biochim Biophys
1298:. Human Embryology Organogenesis
1066:Evolution of sexual reproduction
1047:
1035:
1023:
1011:
999:
865:sexual differentiation in humans
803:Increased secretions of oil and
761:(Adam's apple) and deepening of
40:Male reproductive system (human)
18:Male reproductive system (human)
3177:Trabeculae of corpus spongiosum
3167:Trabeculae of corpora cavernosa
1462:Bjorklund DF, Blasi CH (2011).
936:extends to the midventral line.
861:androgen insensitivity syndrome
3522:Human male reproductive system
1153:Journal of Molecular Histology
1110:Journal of Molecular Histology
1:
1653:10.1016/S0140-6736(59)91893-8
1054:External male genital organs
1896:Berkow, Robert, ed. (1977).
1408:Van de Graaff & Fox 1989
1396:Van de Graaff & Fox 1989
1381:Van de Graaff & Fox 1989
1327:Van de Graaff & Fox 1989
1283:Van de Graaff & Fox 1989
1271:Van de Graaff & Fox 1989
1215:Van de Graaff & Fox 1989
554:it will coincide with the X
203:, which is later born as an
3308:Internal urethral sphincter
1519:"Secondary Characteristics"
875:) can occur. This includes
424:from the epididymis to the
73:systema genitale masculinum
3538:
3443:Posterior scrotal arteries
1688:J. Clin. Endocrinol. Metab
1165:10.1007/s10735-019-09813-3
839:
712:
639:
543:has been initialized by a
519:
435:
413:
398:
368:
310:
234:
212:female reproductive system
29:
3438:Anterior scrotal arteries
3413:Internal spermatic fascia
3398:External spermatic fascia
3357:External urethral orifice
3338:External sphincter muscle
3313:Internal urethral orifice
1735:10.3109/13813459209035274
1616:Larsen's human embryology
1428:Houghton Mifflin Harcourt
1122:10.1007/s10735-018-9759-2
869:testis determining factor
828:Chromosomal abnormalities
642:Development of the gonads
126:
44:
3458:Posterior scrotal nerves
3261:Internal pudendal artery
2792:Male reproductive system
1828:from the 20th edition of
672:indirect inguinal hernia
449:: two glands behind the
148:consists of a number of
146:male reproductive system
51:Male reproductive system
3470:Posterior scrotal veins
3453:Anterior scrotal nerves
3281:Internal pudendal veins
2945:Tubuli seminiferi recti
2410:Lymphoid immune system
1979:Musculoskeletal system
1423:CliffsNotes AP Biology
1364:"Embryo Images Online"
983:anti-MĂĽllerian hormone
957:
937:
913:
881:Klinefelter's syndrome
851:
842:Chromosome abnormality
837:
701:
525:
481:sexual differentiation
375:The testicles are two
361:
353:
279:When the male becomes
227:
128:Anatomical terminology
2398:Myeloid immune system
2184:Cardiovascular system
1882:"Gross Anatomy Image"
1700:10.1210/jcem-37-1-148
1344:www.urologyhealth.org
1196:, pp. 2339–2346.
1042:Sperm release pathway
955:
931:
909:
849:
835:
823:Clinical significance
699:
520:Further information:
498:
359:
351:
225:
171:, which contains the
3099:Bulbourethral glands
2940:Seminiferous tubules
2876:Blood–testis barrier
2750:Islets of Langerhans
2610:Genitourinary system
2346:Integumentary system
1863:The Anatomy Coloring
1507:on February 8, 2009.
1472:. pp. 152–153.
1368:syllabus.med.unc.edu
977:on the floor of the
971:hydatids of Morgagni
813:eccrine sweat glands
646:Paramesonephric duct
516:mitochondrial genome
491:Sexual determination
463:Bulbourethral glands
438:Male accessory gland
385:seminiferous tubules
183:, which, as part of
3362:Lacunae of Morgagni
3150:Suspensory ligament
3023:Testicular arteries
2899:Spermatocytogenesis
2640:Reproductive system
2359:Subcutaneous tissue
2128:Cartilaginous joint
1558:1990Natur.346..240S
1081:Reproductive system
923:primitive sex cords
619:External structures
261:, which is used to
32:reproductive system
3408:Cremasteric fascia
3145:Fundiform ligament
3072:Seminal colliculus
3018:Rectovesical pouch
2999:Pampiniform plexus
2977:Superior ligaments
2972:Inferior ligaments
2422:Respiratory system
2175:Circulatory system
1601:2018-07-28 at the
958:
938:
914:
852:
838:
793:mass and strength.
702:
679:External genitalia
606:labioscrotal folds
526:
518:(at bottom left).
362:
354:
344:Internal genitalia
243:intromittent organ
228:
218:External genitalia
199:) develops into a
185:sexual intercourse
154:human reproduction
3482:
3481:
3478:
3477:
3172:Corpus spongiosum
3162:Corpora cavernosa
3107:
3106:
3077:Ejaculatory ducts
3036:
3035:
2909:Spermatidogenesis
2758:
2757:
2281:
2280:
2271:Glymphatic system
2169:
2168:
1674:Fauci et al. 2008
1552:(6281): 240–244.
1232:www.embryology.ch
1194:Fauci et al. 2008
979:prostatic urethra
967:appendices testis
893:triple X syndrome
877:Turner's syndrome
850:YChromShowingSRY2
514:, as well as the
293:corpus spongiosum
289:corpora cavernosa
142:
141:
137:
16:(Redirected from
3529:
3499:
3498:
3490:
3246:Arteries of bulb
3228:Tunica albuginea
3118:
3050:Seminal vesicles
3042:Accessory glands
3028:Testicular veins
2839:Tunica vasculosa
2834:Tunica albuginea
2829:Tunica vaginalis
2814:
2805:
2785:
2778:
2771:
2762:
2717:Endocrine system
2479:Digestive system
2224:Lymphatic system
2207:Lymphatic vessel
2180:
1984:
1960:
1953:
1946:
1937:
1932:
1913:
1892:
1890:
1889:
1877:
1856:
1822:
1821:
1806:
1805:
1804:
1803:
1780:
1774:
1773:
1753:
1747:
1746:
1718:
1712:
1711:
1683:
1677:
1671:
1665:
1664:
1636:
1630:
1629:
1611:
1605:
1592:
1586:
1585:
1566:10.1038/346240a0
1537:
1531:
1530:
1525:. Archived from
1515:
1509:
1508:
1503:. Archived from
1501:www.hartnell.edu
1493:
1484:
1483:
1470:Cengage Learning
1459:
1442:
1441:
1426:(5th ed.).
1420:Pack PE (2016).
1417:
1411:
1410:, p. 933-4.
1405:
1399:
1393:
1384:
1378:
1372:
1371:
1360:
1354:
1353:
1351:
1350:
1336:
1330:
1324:
1307:
1306:
1304:
1303:
1292:
1286:
1280:
1274:
1268:
1257:
1256:
1254:
1253:
1242:
1236:
1235:
1224:
1218:
1212:
1197:
1191:
1185:
1184:
1148:
1142:
1141:
1105:
1071:Male infertility
1051:
1039:
1027:
1015:
1006:Perspective view
1003:
857:XX male syndrome
817:sebaceous glands
650:Mesonephric duct
613:urogenital sinus
601:cloacal membrane
596:urogenital folds
591:genital tubercle
586:urogenital sinus
447:Seminal vesicles
432:Accessory glands
426:ejaculatory duct
338:spermatic artery
319:cremaster muscle
281:sexually aroused
241:The penis is an
134:edit on Wikidata
49:
37:
21:
3537:
3536:
3532:
3531:
3530:
3528:
3527:
3526:
3507:
3506:
3505:
3493:
3485:
3483:
3474:
3371:
3367:Urethral glands
3345:Navicular fossa
3296:Pudendal nerves
3251:Dorsal arteries
3103:
3032:
3006:Vasa deferentia
2994:Spermatic cords
2928:
2886:Spermatogenesis
2880:
2794:
2789:
2759:
2754:
2711:
2673:Seminal vesicle
2634:
2596:
2546:Small intestine
2473:
2416:
2375:
2340:
2277:
2218:
2165:
2143:Muscular system
2137:
2109:
1988:Skeletal system
1973:
1964:
1929:
1916:
1910:
1895:
1887:
1885:
1880:
1874:
1859:
1853:
1838:
1819:
1815:
1810:
1809:
1801:
1799:
1782:
1781:
1777:
1755:
1754:
1750:
1720:
1719:
1715:
1685:
1684:
1680:
1672:
1668:
1647:(7075): 711–3.
1638:
1637:
1633:
1626:
1613:
1612:
1608:
1603:Wayback Machine
1593:
1589:
1539:
1538:
1534:
1517:
1516:
1512:
1497:"Help is here!"
1495:
1494:
1487:
1480:
1461:
1460:
1445:
1438:
1430:. p. 219.
1419:
1418:
1414:
1406:
1402:
1394:
1387:
1379:
1375:
1362:
1361:
1357:
1348:
1346:
1338:
1337:
1333:
1325:
1310:
1301:
1299:
1294:
1293:
1289:
1281:
1277:
1269:
1260:
1251:
1249:
1244:
1243:
1239:
1226:
1225:
1221:
1213:
1200:
1192:
1188:
1150:
1149:
1145:
1107:
1106:
1099:
1094:
1086:Spermatogenesis
1062:
1055:
1052:
1043:
1040:
1031:
1028:
1019:
1016:
1007:
1004:
995:
989:of the testes.
911:
844:
830:
825:
757:Enlargement of
717:
711:
694:
681:
652:
640:Main articles:
638:
621:
579:
524:
512:sex chromosomes
493:
476:
440:
434:
418:
412:
410:Vasa deferentia
403:
397:
373:
367:
346:
315:
309:
301:pudendal artery
268:and to excrete
239:
233:
220:
138:
52:
35:
28:
23:
22:
15:
12:
11:
5:
3535:
3533:
3525:
3524:
3519:
3509:
3508:
3504:
3503:
3480:
3479:
3476:
3475:
3473:
3472:
3467:
3466:
3465:
3463:Perineal nerve
3460:
3455:
3447:
3446:
3445:
3440:
3432:
3427:
3422:
3417:
3416:
3415:
3410:
3405:
3400:
3395:
3390:
3381:
3379:
3373:
3372:
3370:
3369:
3364:
3359:
3354:
3353:
3352:
3342:
3341:
3340:
3335:
3330:
3325:
3320:
3315:
3310:
3300:
3299:
3298:
3293:
3285:
3284:
3283:
3278:
3273:
3265:
3264:
3263:
3258:
3253:
3248:
3240:
3235:
3230:
3225:
3224:
3223:
3218:
3208:
3207:
3206:
3204:Septum glandis
3201:
3196:
3191:
3181:
3180:
3179:
3174:
3169:
3164:
3154:
3153:
3152:
3147:
3142:
3137:
3126:
3124:
3115:
3109:
3108:
3105:
3104:
3102:
3101:
3096:
3095:
3094:
3089:
3084:
3079:
3074:
3069:
3067:Urethral crest
3059:
3058:
3057:
3055:Excretory duct
3046:
3044:
3038:
3037:
3034:
3033:
3031:
3030:
3025:
3020:
3015:
3014:
3013:
3003:
3002:
3001:
2991:
2986:
2985:
2984:
2979:
2974:
2969:
2959:
2958:
2957:
2955:Efferent ducts
2952:
2947:
2936:
2934:
2930:
2929:
2927:
2926:
2921:
2919:Spermiogenesis
2916:
2911:
2906:
2901:
2896:
2894:Spermatogonium
2890:
2888:
2882:
2881:
2879:
2878:
2873:
2868:
2863:
2858:
2853:
2848:
2843:
2842:
2841:
2836:
2831:
2822:
2820:
2811:
2802:
2796:
2795:
2790:
2788:
2787:
2780:
2773:
2765:
2756:
2755:
2753:
2752:
2747:
2742:
2737:
2732:
2727:
2721:
2719:
2713:
2712:
2710:
2709:
2708:
2707:
2702:
2697:
2692:
2687:
2677:
2676:
2675:
2670:
2665:
2660:
2655:
2644:
2642:
2636:
2635:
2633:
2632:
2627:
2622:
2617:
2612:
2606:
2604:
2602:Urinary system
2598:
2597:
2595:
2594:
2593:
2592:
2587:
2582:
2570:
2569:
2568:
2563:
2558:
2553:
2548:
2538:
2537:
2536:
2531:
2526:
2524:Laryngopharynx
2521:
2511:
2510:
2509:
2504:
2499:
2494:
2492:Salivary gland
2483:
2481:
2475:
2474:
2472:
2471:
2470:
2469:
2464:
2459:
2449:
2448:
2447:
2442:
2437:
2426:
2424:
2418:
2417:
2415:
2414:
2413:
2412:
2402:
2401:
2400:
2389:
2387:
2385:immune systems
2381:Haematopoietic
2377:
2376:
2374:
2373:
2372:
2371:
2361:
2356:
2350:
2348:
2342:
2341:
2339:
2338:
2333:
2331:Somatic system
2328:
2327:
2326:
2321:
2314:Sensory system
2311:
2310:
2309:
2304:
2299:
2291:
2289:
2287:Nervous system
2283:
2282:
2279:
2278:
2276:
2275:
2274:
2273:
2266:CNS equivalent
2263:
2262:
2261:
2256:
2246:
2245:
2244:
2239:
2228:
2226:
2220:
2219:
2217:
2216:
2211:
2210:
2209:
2204:
2199:
2188:
2186:
2177:
2171:
2170:
2167:
2166:
2164:
2163:
2158:
2153:
2147:
2145:
2139:
2138:
2136:
2135:
2133:Synovial joint
2130:
2125:
2119:
2117:
2111:
2110:
2108:
2107:
2102:
2101:
2100:
2095:
2090:
2085:
2080:
2075:
2070:
2065:
2060:
2055:
2050:
2045:
2040:
2035:
2030:
2025:
2020:
2015:
2009:
2003:
1992:
1990:
1981:
1975:
1974:
1965:
1963:
1962:
1955:
1948:
1940:
1934:
1933:
1927:
1914:
1908:
1893:
1878:
1872:
1857:
1851:
1836:
1831:Gray's Anatomy
1814:
1811:
1808:
1807:
1775:
1748:
1713:
1678:
1666:
1631:
1624:
1606:
1587:
1532:
1529:on 2011-09-27.
1510:
1485:
1479:978-1133168379
1478:
1443:
1437:978-0544784178
1436:
1412:
1400:
1398:, p. 934.
1385:
1383:, p. 933.
1373:
1355:
1331:
1329:, p. 932.
1308:
1287:
1285:, p. 929.
1275:
1273:, p. 928.
1258:
1237:
1219:
1217:, p. 927.
1198:
1186:
1159:(2): 141–154.
1143:
1116:(2): 195–208.
1096:
1095:
1093:
1090:
1089:
1088:
1083:
1078:
1073:
1068:
1061:
1058:
1057:
1056:
1053:
1046:
1044:
1041:
1034:
1032:
1029:
1022:
1020:
1017:
1010:
1008:
1005:
998:
994:
991:
840:Main article:
829:
826:
824:
821:
809:
808:
801:
796:Broadening of
794:
787:
773:
766:
755:
748:
713:Main article:
710:
707:
693:
690:
680:
677:
637:
634:
620:
617:
609:
608:
603:
598:
593:
588:
578:
575:
492:
489:
475:
472:
471:
470:
460:
457:Prostate gland
454:
436:Main article:
433:
430:
414:Main article:
411:
408:
399:Main article:
396:
393:
369:Main article:
366:
363:
345:
342:
336:, formed from
334:spermatic cord
330:inguinal canal
311:Main article:
308:
305:
235:Main article:
232:
229:
219:
216:
140:
139:
130:
124:
123:
118:
112:
111:
106:
100:
99:
94:
88:
87:
82:
76:
75:
70:
64:
63:
59:
58:
54:
53:
50:
42:
41:
26:
24:
14:
13:
10:
9:
6:
4:
3:
2:
3534:
3523:
3520:
3518:
3515:
3514:
3512:
3502:
3497:
3492:
3488:
3471:
3468:
3464:
3461:
3459:
3456:
3454:
3451:
3450:
3448:
3444:
3441:
3439:
3436:
3435:
3433:
3431:
3428:
3426:
3423:
3421:
3418:
3414:
3411:
3409:
3406:
3404:
3401:
3399:
3396:
3394:
3393:Dartos fascia
3391:
3389:
3386:
3385:
3383:
3382:
3380:
3378:
3374:
3368:
3365:
3363:
3360:
3358:
3355:
3351:
3348:
3347:
3346:
3343:
3339:
3336:
3334:
3331:
3329:
3326:
3324:
3321:
3319:
3318:Pre-prostatic
3316:
3314:
3311:
3309:
3306:
3305:
3304:
3301:
3297:
3294:
3292:
3291:Dorsal nerves
3289:
3288:
3286:
3282:
3279:
3277:
3274:
3272:
3269:
3268:
3266:
3262:
3259:
3257:
3256:Deep arteries
3254:
3252:
3249:
3247:
3244:
3243:
3241:
3239:
3236:
3234:
3231:
3229:
3226:
3222:
3219:
3217:
3214:
3213:
3212:
3209:
3205:
3202:
3200:
3197:
3195:
3192:
3190:
3187:
3186:
3185:
3182:
3178:
3175:
3173:
3170:
3168:
3165:
3163:
3160:
3159:
3158:
3155:
3151:
3148:
3146:
3143:
3141:
3138:
3136:
3133:
3132:
3131:
3128:
3127:
3125:
3123:
3119:
3116:
3114:
3110:
3100:
3097:
3093:
3090:
3088:
3085:
3083:
3080:
3078:
3075:
3073:
3070:
3068:
3065:
3064:
3063:
3060:
3056:
3053:
3052:
3051:
3048:
3047:
3045:
3043:
3039:
3029:
3026:
3024:
3021:
3019:
3016:
3012:
3009:
3008:
3007:
3004:
3000:
2997:
2996:
2995:
2992:
2990:
2989:Paradidymides
2987:
2983:
2980:
2978:
2975:
2973:
2970:
2968:
2965:
2964:
2963:
2960:
2956:
2953:
2951:
2948:
2946:
2943:
2942:
2941:
2938:
2937:
2935:
2931:
2925:
2922:
2920:
2917:
2915:
2912:
2910:
2907:
2905:
2902:
2900:
2897:
2895:
2892:
2891:
2889:
2887:
2883:
2877:
2874:
2872:
2871:Sertoli cells
2869:
2867:
2864:
2862:
2859:
2857:
2854:
2852:
2849:
2847:
2844:
2840:
2837:
2835:
2832:
2830:
2827:
2826:
2824:
2823:
2821:
2819:
2815:
2812:
2810:
2809:Seminal tract
2806:
2803:
2801:
2797:
2793:
2786:
2781:
2779:
2774:
2772:
2767:
2766:
2763:
2751:
2748:
2746:
2743:
2741:
2738:
2736:
2733:
2731:
2728:
2726:
2723:
2722:
2720:
2718:
2714:
2706:
2703:
2701:
2698:
2696:
2693:
2691:
2688:
2686:
2683:
2682:
2681:
2678:
2674:
2671:
2669:
2666:
2664:
2661:
2659:
2656:
2654:
2651:
2650:
2649:
2646:
2645:
2643:
2641:
2637:
2631:
2628:
2626:
2623:
2621:
2618:
2616:
2613:
2611:
2608:
2607:
2605:
2603:
2599:
2591:
2588:
2586:
2585:Biliary tract
2583:
2581:
2578:
2577:
2576:
2575:
2571:
2567:
2564:
2562:
2559:
2557:
2554:
2552:
2549:
2547:
2544:
2543:
2542:
2539:
2535:
2532:
2530:
2527:
2525:
2522:
2520:
2517:
2516:
2515:
2512:
2508:
2505:
2503:
2500:
2498:
2495:
2493:
2490:
2489:
2488:
2485:
2484:
2482:
2480:
2476:
2468:
2465:
2463:
2460:
2458:
2455:
2454:
2453:
2450:
2446:
2443:
2441:
2438:
2436:
2433:
2432:
2431:
2428:
2427:
2425:
2423:
2419:
2411:
2408:
2407:
2406:
2403:
2399:
2396:
2395:
2394:
2391:
2390:
2388:
2386:
2382:
2378:
2370:
2369:Mammary gland
2367:
2366:
2365:
2362:
2360:
2357:
2355:
2352:
2351:
2349:
2347:
2343:
2337:
2334:
2332:
2329:
2325:
2322:
2320:
2317:
2316:
2315:
2312:
2308:
2305:
2303:
2300:
2298:
2295:
2294:
2293:
2292:
2290:
2288:
2284:
2272:
2269:
2268:
2267:
2264:
2260:
2257:
2255:
2252:
2251:
2250:
2247:
2243:
2240:
2238:
2235:
2234:
2233:
2230:
2229:
2227:
2225:
2221:
2215:
2212:
2208:
2205:
2203:
2200:
2198:
2195:
2194:
2193:
2190:
2189:
2187:
2185:
2181:
2178:
2176:
2172:
2162:
2159:
2157:
2154:
2152:
2149:
2148:
2146:
2144:
2140:
2134:
2131:
2129:
2126:
2124:
2123:Fibrous joint
2121:
2120:
2118:
2116:
2112:
2106:
2103:
2099:
2096:
2094:
2091:
2089:
2086:
2084:
2081:
2079:
2076:
2074:
2071:
2069:
2066:
2064:
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1967:Human systems
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1928:9780071466332
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1826:public domain
1817:
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1767:
1763:
1759:
1758:Funct. Neurol
1752:
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1740:
1736:
1732:
1729:(2): 127–31.
1728:
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1697:
1694:(1): 148–51.
1693:
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1077:
1076:Oncofertility
1074:
1072:
1069:
1067:
1064:
1063:
1059:
1050:
1045:
1038:
1033:
1026:
1021:
1018:Sagittal view
1014:
1009:
1002:
997:
992:
990:
988:
987:Sertoli cells
984:
980:
976:
972:
968:
962:
954:
950:
947:
946:spermatogonia
942:
935:
930:
926:
924:
920:
919:genital ridge
908:
904:
902:
898:
894:
890:
889:XXYY syndrome
886:
882:
878:
874:
870:
867:, called the
866:
862:
858:
848:
843:
834:
827:
822:
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557:
553:
549:
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542:
538:
535:
531:
530:fertilization
523:
517:
513:
509:
506:
503:, showing 22
502:
497:
490:
488:
486:
482:
473:
468:
467:pre-ejaculate
464:
461:
458:
455:
452:
448:
445:
444:
443:
439:
431:
429:
427:
423:
417:
409:
407:
402:
394:
392:
390:
386:
382:
379:that produce
378:
372:
364:
358:
350:
343:
341:
339:
335:
331:
326:
324:
323:dartos fascia
320:
314:
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178:
175:that produce
174:
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147:
135:
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119:
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113:
110:
107:
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83:
81:
77:
74:
71:
69:
65:
60:
55:
48:
43:
38:
33:
19:
3350:Lacuna magna
3328:Intermediate
3276:Vein of bulb
3271:Dorsal veins
2962:Epididymides
2950:Retia testes
2924:Spermatozoon
2904:Spermatocyte
2866:Leydig cells
2791:
2647:
2572:
2540:
2513:
2265:
2248:
2231:
2191:
1918:
1898:
1886:. Retrieved
1862:
1841:
1833:
1823:
1813:Bibliography
1800:, retrieved
1788:
1778:
1764:(1): 17–28.
1761:
1757:
1751:
1726:
1722:
1716:
1691:
1687:
1681:
1669:
1644:
1640:
1634:
1615:
1609:
1590:
1549:
1545:
1535:
1527:the original
1523:hu-berlin.de
1522:
1513:
1505:the original
1500:
1464:
1422:
1415:
1403:
1376:
1367:
1358:
1347:. Retrieved
1343:
1334:
1300:. Retrieved
1290:
1278:
1250:. Retrieved
1240:
1231:
1222:
1189:
1156:
1152:
1146:
1113:
1109:
963:
959:
956:Testosterone
943:
939:
915:
885:XYY syndrome
853:
810:
805:sweat glands
731:, including
722:
718:
703:
686:
682:
668:
664:
660:gubernaculum
653:
630:
622:
610:
580:
571:
552:X chromosome
527:
477:
441:
419:
416:Vas deferens
406:epididymis.
404:
395:Epididymides
389:Leydig cells
374:
327:
316:
278:
245:with a long
240:
209:
162:
145:
143:
97:A09.0.00.002
72:
3216:Superficial
2982:Stereocilia
2851:Mediastinum
2740:Parathyroid
2440:Nasopharynx
2302:Spinal cord
2237:Bone marrow
2006:Collar bone
752:facial hair
656:rete testis
474:Development
422:spermatozoa
237:Human penis
62:Identifiers
3511:Categories
2519:Oropharynx
2259:Lymph node
2192:peripheral
2038:Metatarsus
2033:Metacarpus
2012:Thigh bone
2008:(clavicle)
1909:0911910875
1888:2015-02-23
1873:0064539148
1852:0697056759
1802:2024-04-18
1789:StatPearls
1349:2024-04-17
1302:2015-03-03
1252:2015-03-03
1092:References
1030:Front view
873:aneuploidy
789:Increased
768:Increased
750:Growth of
745:pubic hair
741:chest hair
727:Growth of
626:homologous
556:chromosome
505:homologous
401:Epididymis
150:sex organs
3434:Arteries
3403:Cremaster
3323:Prostatic
3242:Arteries
2914:Spermatid
2818:Testicles
2725:Pituitary
2574:accessory
2529:Esophagus
2249:secondary
2161:Diaphragm
2105:Cartilage
2053:Phalanges
975:utriculus
901:49, XXXXX
798:shoulders
784:structure
737:abdominal
729:body hair
532:when the
522:Karyotype
508:autosomal
501:karyotype
365:Testicles
297:cartilage
263:ejaculate
189:fertilize
173:testicles
3420:Ligament
3194:Frenulum
3189:Foreskin
3113:External
3062:Prostate
3011:Ampullae
2967:Appendix
2846:Appendix
2800:Internal
2705:Placenta
2668:Testicle
2663:Prostate
2590:Pancreas
2551:Appendix
2541:lower GI
2514:upper GI
2462:Bronchus
2405:Lymphoid
2088:Vertebra
2043:Ossicles
2028:Mandible
1797:32491659
1770:19403051
1661:13642858
1599:Archived
1181:58026884
1173:30659401
1130:29453757
1060:See also
934:mesoderm
897:48, XXXX
775:Heavier
733:underarm
371:Testicle
285:erection
255:foreskin
253:and its
167:and the
3501:Anatomy
3449:Nerves
3384:Layers
3377:Scrotum
3303:Urethra
3287:Nerves
3092:Utricle
2856:Lobules
2825:Layers
2745:Adrenal
2735:Thyroid
2653:Scrotum
2630:Urethra
2625:Bladder
2534:Stomach
2457:Trachea
2393:Myeloid
2232:primary
2098:Sternum
2048:Patella
2023:Humerus
2014:(femur)
1743:1379488
1708:4715291
1582:4364032
1574:1695712
1554:Bibcode
1138:3761720
993:Gallery
985:by the
770:stature
715:Puberty
709:Puberty
692:Summary
558:of the
539:of the
534:genetic
451:bladder
332:. (The
313:Scrotum
307:Scrotum
259:urethra
169:scrotum
85:D005837
57:Details
3487:Portal
3430:Septum
3333:Spongy
3267:Veins
3233:Septum
3211:Fascia
3199:Corona
2730:Pineal
2690:Vagina
2685:Uterus
2680:Female
2620:Ureter
2615:Kidney
2561:Rectum
2497:Tongue
2445:Larynx
2364:Breast
2336:Tissue
2254:Spleen
2242:Thymus
2197:Artery
2156:Tendon
2151:Muscle
2115:Joints
2093:Pelvis
2068:Tarsus
2058:Radius
2018:Fibula
2001:Carpus
1971:organs
1925:
1906:
1870:
1849:
1834:(1918)
1795:
1768:
1741:
1706:
1659:
1641:Lancet
1622:
1580:
1572:
1546:Nature
1476:
1434:
1179:
1171:
1136:
1128:
899:, and
791:muscle
759:larynx
670:cause
648:, and
636:Testes
564:female
562:and a
541:zygote
499:Human
377:gonads
274:meatus
205:infant
197:zygote
158:pelvis
3425:Raphe
3238:Raphe
3184:Glans
3135:Crura
3122:Penis
3087:Ducts
3082:Sinus
2933:Other
2861:Septa
2700:Ovary
2695:Vulva
2658:Penis
2580:Liver
2556:Colon
2507:Tooth
2487:Mouth
2452:Lower
2430:Upper
2307:Nerve
2297:Brain
2214:Heart
2073:Tibia
2063:Skull
1578:S2CID
1177:S2CID
1134:S2CID
777:skull
763:voice
567:child
545:sperm
381:sperm
270:urine
266:semen
251:glans
247:shaft
231:Penis
201:fetus
181:sperm
177:semen
165:penis
132:[
121:45664
68:Latin
3388:Skin
3221:Deep
3157:Body
3140:Bulb
3130:Root
2648:Male
2566:Anus
2467:Lung
2435:Nose
2383:and
2354:Skin
2202:Vein
2078:Ulna
1996:Bone
1969:and
1923:ISBN
1904:ISBN
1868:ISBN
1847:ISBN
1793:PMID
1766:PMID
1739:PMID
1704:PMID
1657:PMID
1620:ISBN
1596:Link
1570:PMID
1474:ISBN
1432:ISBN
1169:PMID
1126:PMID
932:The
887:and
859:and
815:and
781:bone
779:and
743:and
560:ovum
548:cell
291:and
193:ovum
179:and
144:The
109:3574
92:TA98
80:MeSH
2502:Lip
2324:Eye
2319:Ear
2083:Rib
1731:doi
1727:100
1696:doi
1649:doi
1562:doi
1550:346
1161:doi
1118:doi
903:.
537:sex
276:.
191:an
116:FMA
104:TA2
3513::
1787:,
1762:24
1760:.
1737:.
1725:.
1702:.
1692:37
1690:.
1655:.
1643:.
1576:.
1568:.
1560:.
1548:.
1544:.
1521:.
1499:.
1488:^
1468:.
1446:^
1388:^
1366:.
1342:.
1311:^
1261:^
1230:.
1201:^
1175:.
1167:.
1157:50
1155:.
1132:.
1124:.
1114:49
1112:.
1100:^
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739:,
735:,
644:,
487:.
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428:.
303:.
283:,
214:.
207:.
187:,
160:.
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2784:e
2777:t
2770:v
1959:e
1952:t
1945:v
1931:.
1912:.
1891:.
1876:.
1855:.
1772:.
1745:.
1733::
1710:.
1698::
1676:.
1663:.
1651::
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1584:.
1564::
1556::
1482:.
1440:.
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1352:.
1305:.
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1234:.
1183:.
1163::
1140:.
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807:.
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765:.
754:.
747:.
136:]
34:.
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
