Lab Quiz #2 vocab Flashcards Preview

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Flashcards in Lab Quiz #2 vocab Deck (7)
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1
Q

what is an artery?

A

any vessel that carries blood away from the heart

2
Q

what is a vein?

A

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

3
Q

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

A

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

4
Q

what is the tunica intima comprised of?

A

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

5
Q

what does the tunica externa contain?

A

areolar connective tissue and adipose

6
Q

what else is visible on the tunica externa?

A

the vasa vasorum

7
Q

what is the vasa vasorum?

A

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