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 ...

A baby's body has about 300 bones at birth. These eventually fuse to form the 206 bones that adults generally have, according to the Nemours Children's Health System. But no matter the age of an ...

The gut lining of the human body is just one cell thick, not because it’s weak, but because it has to absorb nutrients with ...

Everyone has bones, but not everyone understands the importance of changes in what’s going on inside their bodies. Walking, sleeping and having secure organs are all possible with the help of our ...

Few places on Earth — or in our bodies — seem to be free of microplastics. Researchers in recent months have announced the discovery of microplastics traveling in the bloodstream of a handful of ...

The human body is one of the weirdest things around. We’re full of all kinds of squishy fluids, we got our start as a single cell, and we each have a skeleton inside of us. But the weirdness doesn’t ...

For the third weekend in a row, large swaths of the United States have wilted under early-season heatwaves that have set high temperature records from California to Texas. Nearly 100 million Americans ...