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Ch. 22 Vessels
BMS 307: Anatomy
| Question | Answer |
|---|---|
| Intima | the innermost layer of a blood vessel, endothelial lining |
| Media | the middle layer of a blood vessel, contains smooth muscles tissue |
| Adventitia | The outer layer of a blood vessel, very thick |
| Vasoconstriction | when the smooth muscles constrict and reduce the diameter of the blood vessels |
| Vasodilation | when the smooth muscle inside a blood vessel relaxes and the diameter increase |
| Vasa Vasorum | the small blood vessels in the walls of larger vessles that supply the smooth muscle with nutrients |
| Elastic Arteries | Conducting arteries, large vessels that carry large volumes of blood. Ex. aorta and pulmonary trunk |
| Muscular Arteries | Distribution arteries,Transport blood to the body's skeletal muscles and internal organs |
| Arterioles | control the blood flow between arteries and capillaries |
| Capillaries | the smallest and most delicate blood vessels, hey permit exchange between the blood and the surronding interstitial fluid |
| Sinusoids | cappilaries found in the liver that have larger pores |
| Capillary Bed | (or plexus)an interconnected bed of capillaries |
| Precapillary sphincter | a band of smooth muscle that guards the entrance to each capillary |
| Arteriovenous Anastomosis | direct connections between arterioles and venules |
| Venules | the smallest veins, collect blood from cappillaries |
| One-way Valves | valves in veins so that blood flows up and does not flow down with gravity |