The trachea, also called the windpipe, is part of the passageway that supplies air to the lungs. Any prolonged blockage, even for a few minutes, can cause death. The trachea is about 4.5 inches long ...

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 ...

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 ...