CHAPTER 20

Question 1

arteries

Answer 1

carry blood away from the heart towards the capillaries

Question 2

veins

Answer 2

carry blood back toward the heart from the capillaries

Question 3

capillaries

Answer 3

the site of exchange between blood and tissue

Question 4

walls composed of 3 layers called

Answer 4

tunics

Question 5

3 tunics of a vessel

Answer 5

tunica intima, tunica media, tunica externa

Question 6

space inside of vessel is called

Answer 6

lumen

Question 7

vessles that lie next to each other

Answer 7

companion vessles

Question 8

Which has a narrower lumen, an artery or a vein?

Answer 8

artery

Question 9

3 basic types of arteries

Answer 9

elastic, muscular, arteriole

Question 10

largest arteries. they have elastic fibers allowing stretch and recoil. examples are the aorta, pulmonary trunk, common carotid, and common ililac arteries

Answer 10

elastic arteries

Question 11

muscular arteries are medium arteries with muscles allowing vasoconstriction. they have elastic tissue in two layers :

Answer 11

internal elastic lamina, external elastic lamina