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 ...

We have now been able to determine the crystal structure of xenon by a method ... as a very thin layer upon the surface of a quartz capillary internally cooled by liquid air.