Blood Flow Through Vessels

Blood flow moves from the heart into the aorta, the largest artery in the body, and then into smaller arteries, arterioles, and capillaries. As the vessels get smaller, the speed of blood flow decreases. When blood returns to the heart through venules and veins, its velocity increases again.

This...

Blood flow is driven by the heart which must be strong enough to push blood throughout the body into all of the major arteries, arterials and smallest capillary beds.

When blood leaves through the aorta and enters smaller arterials and capillaries, its high velocity and high pressure decrease, as a result of the increased combined diamet...