A computer-generated image of red blood cells. Nitric oxide—known by the formula NO—is so vital for humans’ internal physiological processes that it was crowned Molecule of the Year in 1992. It plays ...

While the human body doesn’t replace itself every seven years in a uniform way, it does engage in constant renewal.

An organ is a group of tissues that work together to perform a specific task in the body, such as digesting nutrients or producing chemical messengers that enable brain cells to communicate. Although ...

The human body functions as a highly intricate and interconnected system — when one area falls out of harmony, it often causes ripple effects throughout the rest. Instead of remaining silent, your ...