Venous return

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  • Created by: z_mills1
  • Created on: 05-06-14 15:21
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  • Venous return
    • mechanisms that assist the return of blood to the heart
    • Skeletal pump
      • the muscles surrounding the veins expand and contract, pressing on the veins, causing a pumping effect
        • this pushes the blood back towards the heart because the valves in the veins prevent flow in the other direction
    • Respiratory pump
      • muscles around the thoracic and abdominal region cause changes in pressure
        • these changes allow veins to compress, causing blood to be forced to flow back to the heart
    • Valves
      • prevent blood flowing back away from the heart in the veins

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