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 ...

There are three types of blood vessel ... The circulatory system is the heart and all the blood vessels in the body which carry cells and substances to all its parts. The heart is a large muscular ...

So far, nothing we’ve been able to create can replace blood. “Whole blood” consists of three different types of cells (red ...