The human circulatory system can also take a hit because of the air since creatures living underwater breathe in denser air. However, Dituri reported that he got greater amounts of REM sleep ...

Imagine students stepping inside their lessons instead of just reading about them. Instead of drawing the human circulatory system, they might ‘travel’ through their own blood vessels, interacting ...

The human immune system is a remarkable evolutionary tool that is often taken for granted—until, that is, something gets past its cellular defenses. However, this complex system of cells ...