Take a deep breath — here's how the respiratory system works. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. The human respiratory system is a ...

The respiratory system allows air to reach the lungs, from which oxygen enters the blood and circulates to all body cells. This system also removes waste gases from the body and helps prevent disease ...

The respiratory system is made up of several organs and structures, including the lungs, windpipe, diaphragm and alveoli. It is responsible for taking in oxygen and expelling carbon-dioxide waste.