1. During systole, the heart exerts pressure, propelling blood into the aorta, initiating blood circulation throughout the body. The aorta branches into the dorsal aorta, supplying the upper body before dividing into arteries that extend into the legs. Blood moves in the legs due to pressure and gravitational forces.
2. Muscles in the legs play a crucial role in returning blood to the heart. Contraction and relaxation of body muscles, as they move, compress veins, pushing blood towards the heart.
3. Veins in the legs are equipped with valves to facilitate this process, preventing blood from backflowing towards the feet.
4. This coordinated system ensures the continuous movement of blood in the major veins of the legs.