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 ...

Type R capillaries. These are a special, physiologically important group of blood vessels that are essential for maintaining healthy bones throughout adulthood and especially during the aging process.