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Blood Low Pressure Heart Resistance Explain Structure Veins

Front Explain how the structure of veins makes them adapted for their function.
Back Veins:
  • Function: carry low pressure deoxygenated blood (except pulm vein) to the heart
  • Thin walls - no need for resistance to pulse because surges from heart are lost as blood passes thru capillaries 
  • Large lumen to allow more blood to flow with less vessel resistance because it is at low speed & pressure
  • Valves to prevent backflow because blood is low pressure




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