14 Blood Vessels (Lecture) Flashcards
(114 cards)
Named vessels have _____ layers
3
Capillaries have 3 layers Y or N
N
Tunica interna is also called the
Endothelium
Tunica media
smooth muscle
Tunica externa
protective layer of dense connective tissue
Lumen
hallow interior of a vessel
Arteries are divergent or convergent
divergent
Arteries have ___________reserviors.
pressure
Arteries can store pressure genterated by the heart by
stretching
Arteries are not located
superfically they are deep near bones
Metarterioles
path from artery to to vein does not go through capillary first.
Arterioles (vasoconstriction)
microscopic arteries still have 3 layers usally refered to as arteries
Precapillary sphincters
are muscle that control weather blood flow into a capillary or not.
What vessels are the only site for gas exchange in the body
capillaries
capillary beds
large groups of capillaries
capillaries are leaky vessels
by design
what leaks out of capillaries
plasma, O2, CO2, amino acids, glucose
what are most capillaries made of
simple squamous
Venuoles
microscopic veins drain blood out of capillaries
Venoconstriction
when veins contrict
Veins have _________reserviors
volume
what percent of our total blood volume is in veins?
60%
what percent of our total blood volume is in arteries?
18%
We have twice as many ___________
veins than arteries