Each square inch of human skin consists of 6m (20ft) of blood vessels. Veins hold about 65 pc of the body's blood and have one-way valves to help blood move. Capillaries, which carry blood to our ...

Inside you, there is an amazing network of blood vessels, the tubes that carry blood all around your body. Every part of the body needs oxygen, food and water. The blood vessels are a bit like ...

is caused by the bursting of tiny blood vessels beneath the clear surface of the eye. It is typically a harmless condition, causing a blotchy red speck or area of red discoloration that resolves ...