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Venules

Venules. By: Riley, Chirag , Manjot and Arsalan. How big are venules ? . Venules are very small; they are smaller than veins but larger than capillaries. Total Cross-Sectional Area. Same total cross-sectional area as the arterioles and are tied for the second lowest.

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Venules

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  1. Venules By: Riley, Chirag, Manjot and Arsalan

  2. How big are venules? • Venules are very small; they are smaller than veins but larger than capillaries.

  3. Total Cross-Sectional Area • Same total cross-sectional area as the arterioles and are tied for the second lowest.

  4. Blood Velocity in Venules • Blood velocity slightly increases as the blood flows from the capillaries to the venules.

  5. Blood Pressure in Venules • Blood pressure in venules is minimal (20-0mm Hg). This is because blood pressure drops the further you go away from the heart.

  6. Direction of Blood Flow • Venules take blood from the capillary beds to the heart. venule Blood Flow Red Blood Cells Capillary

  7. Valves • Yes, they prevent the backward flow of blood.

  8. Walls of Venules • Venules have the same three layers as arteries, but there is less smooth muscle and connective tissue. (walls are thinner compared to arteries).

  9. Oxygenated or Deoxygenated • Blood in venules are deoxygenated. V = VenuleA = Arteriole

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