The heart and blood vessels comprise the two elements of the cardiovascular system that work together in providing nourishment and oxygen to the organs of the body. The activity of these two elements is also coordinated in the body's response to stress.
graft vs fistula. A graft is usually in a horse-shoe or letter C shape, and is normally firmer to the touch. Fistulas usually run up and down and are more squiggly shaped, with bumps (pseudo anurisms) and softer to the touch. Here are some good pics of fistulas. For some reason, I could not find any pics of grafts on the net.
1 A fistula (also called an arteriovenous fistula or A-V fistula) is made by joining an artery and a vein under the skin in your arm. 2  When the artery and vein are joined, the pressure inside the vein increases, making the walls of the vein stronger.3  The stronger vein can then receive the needles used for hemodialysis.our arteries and veins are usually too small, so surgery is done to create a vascular access site. There are 3 kinds of vascular access sites: 1  A fistula (also called an arteriovenous fistula or A-V fistula) is made by joining an artery and a vein under the skin in your arm.