Each 2.54 square centimetre (a square inch) of human skin has six metres (20ft) of blood vessels. Veins hold about 65 per cent of the body's blood and have one-way valves tohelp blood move.

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 ...

Stem cells are special cells in the body that can divide and turn into ... NO hi HSCs depended on their location near specialized blood vessels that have a distinctive hairpin-curve shape.