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.
The main difference between cord blood and cord tissue is the type of cells that are harvested. Cord blood contains hematopoietic stem cells; cord tissue contains mesenchymal stem cells. Both sets of cells offer the chance for stem cell rejuvenation and both could provide you with life saving opportunities.