You may understand the respiratory and digestive systems as separate entities but, in many ways, the two are intimately connected. For example, breathing provides oxygen to help your digestive tract ...

Here’s what happens to foods and beverages as they make their way through your gastrointestinal tract — and the problems that can develop along the way. You know what food looks like when it enters ...

Are you a "morning person" or a "night owl?" Scientists have found that there are significant differences in the way our brains function depending on whether we're early risers or night owls.

The endocrine system uses chemical messengers called hormones to regulate a range of bodily functions through the release of hormones. The endocrine system is a network of glands and organs located ...