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.
A perianal abscess is an infection in a mucous-secreting gland in the anal canal around your anus. What is a perianal fistula? A perianal fistula, almost always the result of a previous abscess, is a small passage connecting the anal gland from which the abscess arose to the skin where the abscess was drained.