Space to play or pause, M to mute, left and right arrows to seek, up and down arrows for volume. There's perhaps no element of the body that captures our imagination more than the heart. We link it ...

The circulatory system is responsible for the delivery of blood, and therefore glucose in the blood, round the body. The different complications of diabetes are a consequence of damage to blood ...

There are three types of blood vessel: arteries, veins and capillaries. The heart is a muscular organ that pumps blood around your circulatory system. The circulatory system is the heart and all the ...