circulatory system Flashcards
1
Q
Pulse
A
ventricles contracts, artery walls to bulge and spring back
2
Q
Systemic circuit
A
distribution of blood to particular body parts is adjusted by altering the diameter of arterioles
3
Q
Vasodilation
A
occurs in arterioles in the extremities
4
Q
Vasoconstriction
A
occurs in arterioles of the gut
5
Q
capillary
A
cylinder of endothelial cells, one cell thick, wrapped in basement membrane, its tiny diameter facilitate exchanges between blood and interstitial fluid
6
Q
Capillaries empty to
A
veins
7
Q
exchange of oxygen happens
A
with veins, low-resistance vessels that convey blood to the heart. Veins have a flaplike valves that help prevent backflow
8
Q
blood pressure
A
pressure exerted by blood on the walls of blood vessels
