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common cell type in connective tissues. If fibrocytes are stimulated by damage to the surrounding tissue, the fibrocyte is altered into a fibroblast. The fibroblasts contain organelles that are necessary for the synthesis and excretion of proteins needed to repair the tissue damage. Fibrocytes usually do not leave the connective tissue. Reticular cells are usually larger than fibrocytes. Reticular cells are the fibrocytes of reticular connective tissue and form a network of reticular fibers. Adipocytes are fat cells that are fixed cells in loose connective tissue. Their main function is the storage of lipid. Macrophages arise from monocytes. Monocytes originate in the bone marrow upon which they are released into the blood stream. They are mobile and leave the blood stream to enter connective tissues where they differentiate into macrophages. The fibroblasts are the most important in the connective tissue. Fibroblasts manufacture and maintain the extracellular material. They migrate throughout the extracellular matrix to wherever they are needed. Adipocytes are cells that are very efficient at storing energy in the form of triglycerides.
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antibody, specific to only one type of foreign substance. For example, where one cell produces antibody against one of the many viral causes of a cold, another cell's antibodies will ignore the presence of the same virus completely. Normally, the body contains many different B cells, specialized for a specific invader, but only has low levels of each type circulating. When an invader manages to break past other defenses, like the skin or digestive tract into the body, then the circulating B cells that target that particular foreigner multiply up and produce more antibody. Special forms of B cell called plasma cells produce antibodies; little versions of the specialized B cells, called memory B cells, remain stored in lymph glands prepared for the next invasion by the foreigner. Although the products of B cells, the antibodies, stick onto their target invader, they most often do not kill the invader. This job falls to other types of lymphocytes called T cells. There are three different forms of T cells, which are the Helper T cells, the Killer T cells, and the
Suppressor T cells.
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B cells are wandering cells that are antibody factories. They are capable of producing molecules that can recognize and bond to specific types of molecules present in infectious organisms or substances that the body identifies as foreign. Every individual B cell makes only one particular type of
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Wandering Cells are probably amoeboid when alive but after fixations they are seen to possess a distinct nucleus. These cells are regarded as a special type of blood cell. The cells were found to take up iron saccharate, which had been injected into the hemocoele. The cell's cytoplasm contains a
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Connective tissue cells are typically divided into two types, fixed cells and wandering cells. Fibrocytes, or fibroblasts and fat cells(adipocytes) are fixed cells, where as macrophages, monocytes, lymphocytes, plasma cells, eosinophils and mast cells are wandering cells. Fibrocytes are the most
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Lymphocytes: These are cells responsible for immune responses that circulate in the blood. Normally, only small numbers are found in the CTs throughout the body. The number increases dramatically at certain sites of tissue inflammation. They are also very numerous in the lamina propria of the
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Macrophages: Supported by a network of connective tissue. Understood as the
Reticuloendothelial System, the RES allows microglial differential in the CNS, pulmonary alveolar macrophages, tissue histiocytes, Kupffler Hepatic macrophages, Glomerular Mesangial Proliferation and unnamed Splenic
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Lymphocytes are just one group of cells that function as part of the immune system. More of this group travel around the lymphatic system than in the blood network. Two types of lymphocytes are present in the bloodstream, which are the B cells and the T cells.
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Monocytes: Monocytes are white blood cells that will give rise to all the phagocytes of the mononuclear phagocytic system (see Ross et al., pg. 110, and Table 5.4, pg. 112). In CT, they give rise to macrophages (histiocytes).
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variety of inclusions and characteristically, a well-marked eosinophile area. The wandering cells of nudibranchs are excretory taking up effete matter from the hemocoele and discharging it into the lumen of the gut.
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respiratory and gastrointestinal tracts, where they are involved in immunosurveillance. The lamina propria is a layer of loose CT lying immediately beneath the epithelium.
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Plasma cells: Plasma cells are derived from B-lymphocytes and produce antibodies against a specific antigen. They have a limited migratory ability and a short life.
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Eosinophils: Eosinophils are white blood cells that are found in the lamina propria of the GI tract, and at sites of allergic reaction and parasitic infection.
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Basophils: Basophils are white blood cells that are similar to mast cells in having vasoactive agents released in response to an allergen.
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expression of wandering macrophages. Sharing of iron storage remains an essential mystery.
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132:ameboid cell
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38:Please help
33:verification
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677:Specialized
667:Mesenchymal
638:Aponeurosis
389:Tendon cell
351:Composition
332:Soft tissue
193:Lymphocytes
140:histiocytes
126:, the term
422:Macrophage
399:Melanocyte
374:Fibroblast
325:Physiology
253:2008-11-27
237:Dictionary
218:References
66:newspapers
685:Cartilage
654:Embryonic
611:Submucosa
571:Reticular
500:Fibrillin
417:Mast cell
394:Adipocyte
379:Fibrocyte
235:eMedicine
124:histology
714:Category
628:Ligament
367:Resident
342:Scarring
337:Fibrosis
212:Amoeboid
206:See also
576:Adipose
527:Elaunin
522:EMILIN1
495:Elastin
120:anatomy
80:scholar
662:Mucoid
633:Tendon
616:Dermis
554:Proper
483:COL3A1
465:Fibers
438:matrix
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695:Blood
598:Dense
586:White
581:Brown
563:Loose
546:Types
359:Cells
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