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 ...

which are cultured in specific conditions that allow them to form a vessel structure. "These smooth muscle cells were set up in culture to continue to live and generate new smooth muscle cells ...