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Blood Vessels

This overview provides a detailed understanding of blood vessel anatomy and functions. It covers the three main layers of blood vessels: the tunica interna (endothelium), tunica media (smooth muscle), and tunica externa (connective tissue). It distinguishes between arteries, arterioles, capillaries, veins, and venules, emphasizing their roles and differences. The discussion includes the nature of blood flow, the significance of one-way valves, and the differences between oxygenated and deoxygenated blood. This foundational knowledge is crucial for understanding circulatory system health.

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Blood Vessels

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  1. Blood Vessels

  2. Tunica interna (intima) Inner layer of arteries and veins Endothelium made of simple squamous epithelial cells

  3. Tunica media Consists of smooth muscle

  4. Tunica externa (adventitia) Made of connective tissue

  5. Artery

  6. Arteriole Small blood vessel coming off a larger artery

  7. Capillary Smallest of the body’s blood vessels Filled with red blood cells

  8. Venule Small blood vessel feeding into a larger vein

  9. Arteriole and Venule Compared Venule Arteriole

  10. Vein

  11. One-way valve

  12. Oxygenated blood (red vessels)

  13. Deoxygenated blood (blue vessels)

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