venous circulatory system Flashcards
what provides resistance to blood flow and governs the pressure in the arterial tree (2 names) also known as resistance vessels
arterioles and precapillary sphincters
what collects blood from the capillary beds
venules
whats the name of the paired veins that often accompany arteries
vena combatants
whats the avg total blood volume of an adult
5L
most common blood cell
erythrocyte AKA RBC
second most common blood cell
leukocytes (WBC)
what blood cell is involved in wound repair/clotting
platelets
what system is considered low pressure and high volume
venous system
single layer of endothelial cells
tunica intima
thick layer of smooth muscle cells and collagen fibers
tunica media
fibrous layer surrounding elastic tissue
tunica adventitia
a network of tiny vessels supplying walls of large veins and arteries with nutrients and oxygen
vasa vasorum
whats the SVC formed by
junction of right and left brachiocephalic veins (innominate)
what forms the brachiocephalic veins
junction of internal jug and subclavian
what drains the superficial areas of face and scalp
external jugs