In humans where does blood in the external iliac artery come from?

The external iliac artery is a major artery that supplies blood to the lower limb. It arises from the common iliac artery, which in turn arises from the abdominal aorta. The abdominal aorta is the largest artery in the body and it carries oxygenated blood from the heart to the abdomen and lower limbs.

The external iliac artery runs down the side of the pelvis and enters the thigh, where it divides into the femoral artery and the profunda femoris artery. The femoral artery is the main artery of the thigh and it supplies blood to the muscles, bones, and skin of the thigh. The profunda femoris artery supplies blood to the deep structures of the thigh, including the hip joint.

The blood in the external iliac artery comes from the heart. The heart pumps oxygenated blood into the aorta, which then carries the blood to the common iliac artery and the external iliac artery. The external iliac artery then carries the blood to the lower limb.