Knowledge (XXG)

Blood–air barrier

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This blood–air barrier is extremely thin (approximately 600 nm-2μm; in some places merely 200 nm) to allow sufficient oxygen diffusion, yet it is extremely strong. This strength comes from the
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cells. Damage can occur to this barrier at a pressure difference of around 40 millimetres of mercury (0.053 bar).
685: 236:, and breathing gas entrapment or retention in the lung during depressurization, which can occur during ascent from 276: 565: 288: 282: 270: 580: 94: 82: 264: 606: 363: 355: 106: 267: – Semipermeable capillary border that allows selective passage of blood constituents into the brain 248: 172: 99: 560: 225: 596: 479: 359: 348:- Comparative Organology at University of California, Davis – "Mammal, lung vasculature (EM, High)" 279: – Part of the blood–ocular barrier that prevents certain substances from entering the retina 616: 152: 60: 285: – Physical barrier between the blood vessels and the seminiferous tubules of animal testes 621: 441: 414: 406: 368: 322: 316: 237: 168: 156: 602: 528: 205: 592: 548: 184: 374: 273: – Physical barrier between the local blood vessels and most parts of the eye itself 648: 643: 638: 431: 294: 180: 199:
Cross section of an alveoli with capillaries. The barrier is pointed above everything.
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Possible consequences of rupture of the blood–air barrier include
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Membrane separating alveolar air from blood in lung capillaries
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or loss of pressure from a pressurized vehicle, habitat or
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Index

Blood-air barrier

System
Respiratory system
Lungs
MeSH
D015824
TH
H3.05.02.0.00040
Anatomical terminology
edit on Wikidata
gas exchanging
lungs
blood
alveoli
type I pneumocytes
endothelial
capillaries
basement membrane
permeable
oxygen
carbon dioxide
carbon monoxide

type IV collagen
endothelial
epithelial
pulmonary barotrauma
blast injury
swimming-induced pulmonary edema

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