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 is responsible for the exchange of carbon dioxide and oxygen in the human body. This system also helps remove metabolic waste products and keep pH levels in check. The major ...

Lack of exercise is a well-known risk factor for conditions such as cardiovascular disease, diabetes and certain forms of cancer. But some research also suggests that physical inactivity should be ...