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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

Venules

By: Riley, Chirag, Manjot and Arsalan

how big are venules
How big are venules?
  • Venules are very small; they are smaller than veins but larger than capillaries.
total cross sectional area
Total Cross-Sectional Area
  • Same total cross-sectional area as the arterioles and are tied for the second lowest.
blood velocity in venules
Blood Velocity in Venules
  • Blood velocity slightly increases as the blood flows from the capillaries to the venules.
blood pressure in venules
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.
direction of blood flow
Direction of Blood Flow
  • Venules take blood from the capillary beds to the heart.

venule

Blood Flow

Red Blood

Cells

Capillary

valves
Valves
  • Yes, they prevent the backward flow of blood.
walls of venules
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).
oxygenated or deoxygenated
Oxygenated or Deoxygenated
  • Blood in venules are deoxygenated.

V = VenuleA = Arteriole