Study Guide Blood Vessels Flashcards
Blood vessel walls
Tunica externa
tunica media
tunica interna
large/medium
Artery wall features
internal elastic lamina between interna and media
external elastic layer between media and externa
artery classes
Conducting ateries
distributing arteries
resistance arteries
conducting artery
largest
aorta, subclavian, etc…
distributing artery
transport blood to organ
renal, hepatic, etc…
resistance artery
smaller arteries
arterioles
metarterioles
capillaries
continuous
fenestrated
sinusoids
continuous capillaries
occur in most tissues
endothelial cells joined by tight junction
intercellular clefts between cells allow for exchange
fenestrated capillaires
kidneys, small intestines
endothelial cells contain pores called filtration pores
allow for high rate of exchange
sinusoid capillaries
liver, bone and spleen
endothelial cells separated by large gap no basil lamina
allows for formd elemants to enter and exit capillary
vein types
postcapillary
muscular veins
medium veins
venous sinuses
large veins
Artery function
transfer blood away from heart
capillary function
exchange vessels
vein function
route blood back to heart