Abdominal aorta. The portion of the largest artery in the body that runs through the abdomen; it supplies oxygenated blood to the abdominal and pelvic organs and the legs.lower limb is divided into three regions. These are the thigh, located between the hip and knee joints; the leg, located between the knee and ankle joints; and distal to the ankle, the foot. There are 30 bones in each lower limb.