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Blood Vessels

Blood Vessels. What goes around Comes around. I. Definitions. A. Arteries B. Arterioles C. Capillaries D. Venules E. Veins. II. Structure of blood vessels. A. Tunica intima-simple squamous epithelium B. Tunica media-varying amounts of elastin and muscle

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Blood Vessels

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  1. Blood Vessels What goes around Comes around

  2. I. Definitions • A. Arteries • B. Arterioles • C. Capillaries • D. Venules • E. Veins

  3. II. Structure of blood vessels • A. Tunica intima-simple squamous epithelium • B. Tunica media-varying amounts of elastin and muscle • C. Tunica externa-supplies nourishment to vessel

  4. III. Specific functions of vessel type • A. Artery • 1. Relatively large individual diameters • 2. High pressures • 3. Tunica media a lot of elastic fiber • 4. Dampens pressure fluctuation • 5. Propels blood into vascular tree during diastole • 6. Blood pressures

  5. B. Arterioles • 1. much less elastic tissue • 2. more smooth muscle • 3. regulate delivery of blood to tissues • 4. function as faucets • 5. sympathetic nervous system • 6. local factors

  6. C. Capillaries • 1. simple squamous endothelium • 2. no smooth muscle • 3. function • 4. dynamics across bed • 5. YouTube microcirculation

  7. D. Veins • Structure • Valves • Experiment • Blood resevoir

  8. E. Varicosities and treatments • 1. example • 2. treatment

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