Human Anatomy

Every function of the human body is meaningful. They are functions that have been left over from hundreds of thousands of years of human evolution. For example, shaking your legs may seem meaningless, but in fact, in the history of human hunting, it is mainly used to prevent leg cramps caused by muscle stiffness and avoid life-threatening leg cramps during hunting or being hunted. In practice, it can mainly improve blood circulation in the legs, prevent calf vein thrombosis and varicose veins, a

The Human Body