1. MAJOR BLOOD VESSELS

2. Fig. 13.1
Blood Vessel Types

3. Structure matches Function
Arteries – Carry Blood Away from heart. Must withstand high blood pressure against wall. Must use smooth muscle in walls to dilate (relax) and constrict (tighten) to help adjust blood pressure.

4. Structure matches Function
Capillaries – Microscopic blood vessels that allow exchange between blood and outlying tissue fluid around bodily cells. Wall of capillary is only one cell thick, and cells are flat to facilitate diffusion.

5. May use sphincter muscles to open and close capillary beds to shunt blood to areas of the body requiring blood at a particular time. Ex. To gut when digesting, to muscles when exercising. This opening and closing of capillary beds can also help regulate blood pressure in the body. The more open, the lower the BP.

6. Structure matches Function
Veins – Contain valves to keep blood from back-flowing. Wall is much thinner than artery as blood pressure is at all-time low.

7. Fig. 13.2

8. Fig. 13.9

9. Fig. 13.3a

10. Fig. 13.8
Major Arteries

11. Fig. 13.8
Hepatic Portal Vein
Major Veins

12. Fig. 13.7

13. Fig. 13.8
Practice Quiz B A
Label paper
A  L C D
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14. Practice Quiz E F G

15. Fig. 13.7 H K I J L