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The greatest source of resistance to blood flow through the cardiovascular system are the capillaries, however,...

The greatest source of resistance to blood flow through the cardiovascular system are the capillaries, however, the most important site for the regulation of blood flow are the arterioles. How does altering arteriole diameter alter blood flow into capillary beds?

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Answer #1

Question no 1

The arterioles are the ones that control the flow of blood to Capillary upon different stimulies

  1. It controlled the capillary pressure by vasodilation that is by decreasing the diameter which caused the increasing blood flow to the capillary
  2. It control the capillary pressure by vasoconstriction that is by reducing the diameter of the arterioles which cause the reduced blood supply to arterioles

The blood from heart that is supplied reach the aorta to the arteries then to arterioles which control the blood flow to capillary . So it is effective

Some times the blood by arterioles by pass the capillary

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