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.

All blood vessels are specifically structured to perform their function. For example, a capillary is microscopically thin to allow gases to exchange, the arteries are tough and flexible to cope ...

All blood vessels are specifically structured to perform their function. For example, a capillary is microscopically thin to allow gases to exchange, the arteries are tough and flexible to cope ...

Laura Niklason, chief executive of Humacyte. The company’s blood vessels, which have thick walls similar to arteries, can ...

early embryonic veins play a role in building the rest of the blood vessels. More information: Joanna Wong et al, Dynamic ...