Class notes
Capillary fluid exchange
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Lecture notes of 6 pages for the course Medicine at QUB (Physiology)
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CAPILLARY FLUID EXCHANGEStructure t function of capillaries
Smallest blood vessels Exchange between blood and
interstitial fluid
Thin walls Endothelium t basement membrane
No smooth muscle
High permeability
Numerous large surface area
Capillaries capillary beds micro beds
Micro circulation
Capillary bed Network of capillaries within tissue
Capillary blood flow is controlled by Vasomotion in
, pre capillary sphincter and meta arterioles
of
Types capillaries
A Continuous location muscle skin lungs CNS
Permeability Low
B Fenestrated location Exo 1 endocrine glands renal
glomeluri intestinal mucous a
Permeability Relatively High
C Discontinuous location Liver spleen Bone marrow
Permeability ExtremelyHigh
Substances enter t leave
capillary three ways
the
Diffusion Regulate fluid composition
Vesicular transport
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