Your intestine completely rebuilds its inner lining every few days—one of the fastest renewal processes in the human body.

Villi are tiny projections in the small intestine that absorb nutrients from food. Diseases like celiac disease and inflammatory bowel disease can damage villi and cause malabsorption. Villi are ...

Researchers have found that the small intestine grows in response to pregnancy in mice. This partially irreversible change may help mice support a pregnancy and prepare for a second. Researchers at ...