Human bodies are designed to move in order to circulate blood and nutrients to every cell.

The human heart is at the center of the circulatory system. This vital organ tirelessly pumps the blood through the body, sending oxygen and nutrients into tissues and carrying waste products away ...

Your body's circulatory system is a wondrous thing. It's made up of blood vessels that carry blood to and from your heart and also pumps blood to your lungs so you can breathe. It helps grow and ...