CVT 101 Vascular Anatomy Flashcards Preview

101 Cardiovascular Physiology 1 Fall 2013 > CVT 101 Vascular Anatomy > Flashcards

Flashcards in CVT 101 Vascular Anatomy Deck (17)
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what is the three circulatory circuits?

Systemic
pulmonary
portal

1

What is the function of the portal system?

The portal system screens what you ingest before it goes into the systemic circulation.

2

what is the function of the pulmonary system?

lung circulation

3

What is the function of the systemic circulation?

whole body circulation

4

What is renal function?

kidney circulation/filter

5

what starts and ends as capillaries instead of arteries and veins?

portal system - begins and ends as capillaries.

6

Whaich might be considered a fourth circulatory circuit?

renal

7

portal system

begins and ends as capillaries connects digestive loop with liver, hepatic vein, and IVC. RBC hemoglobin cycle

8

five types of vessels

artery
arterioles
capillaries
Venules
veins

9

Which contains most of the blood volume?

64% venules, veins, and vena vavae
2/3 to 3/4 of blood volume

10

which type of vessel consists of only one layer of endothelial cells?

capillaries

11

Veins have approximately how much more CSA than arteries at the same level?

Total CSA about it times that of corresponding arteries.

12

Across which vessels does the greatest pressure drop occur?

arterioles

13

What is a vaso vasorum?

blood supply to the vascular tissue

14

what are the three layers of vessel walls?

1. Tunica intima: smooth inner lining of vessels; single layer of endothelial cells Normally has anti-clotting, anti-platelet properties; interruption of these may start most vascular disease— both atherosclerosis and thrombosis

2. Tunica media: middle layer with smooth muscle cells, elastin, and collagen Composition of this layer determines the vessels' mechanical properties

3. Tunica adventitia: outer layer made up of connective tissue

15

What is the relative proportion of elastic to smooth muscle tissue in the media in proximal arteries vs. distal arteries?

So proximal to arteries the more elasticity you have and less smooth muscle and the more distal you go less elasticity there is and more smooth muscle.
why?

16

what is the effect of sympathetic nerve activity on arterioles?

is to contract them.