The circulatory system of the human body is complex. It is bound together by blood vessels, including arteries, veins, and capillaries, that facilitate the flow of blood throughout the body. The heart ...

Well, the blood has to be kept moving around all the time because it's the body's delivery system. Every possible part of the body has to be supplied with oxygen and food and water, and the veins and ...

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 ...