Lab Quiz #2 vocab

Question 1

what is an artery?

Answer 1

any vessel that carries blood away from the heart

Question 2

what is a vein?

Answer 2

any vessel that returns blood from a capillary network back to the heart

Question 3

what 3 layers is the wall of the artery comprised of?

Answer 3

1) innermost layer, tunica interna (intima)
2) middle, tunica media
3) outermost layer, tunica externa

Question 4

what is the tunica intima comprised of?

Answer 4

one layer of endothilium (simple squamous epithelium). a thick layer of smooth muscle and the external elastic lamina

Question 5

what does the tunica externa contain?

Answer 5

areolar connective tissue and adipose

Question 6

what else is visible on the tunica externa?

Answer 6

the vasa vasorum

Question 7

what is the vasa vasorum?

Answer 7

small nutrient vessels that supply the wall of all arteries and vein larger than one millimeter in diameter