Physiology Facts

If you were to roll a lung from a human body and out flat it would be the size of a tennis court.

Deep Breathing gives you health benefits similar to aerobics.

A hard working adult sweats up to 4 gallons per day. Most of the sweat evaporates before a person realizes it's there, though!

The human sigh acts as a physiological reset button.

Your body is creating and killing about 2.4 million red blood cells per second.