The human digestive system refers to the organs that take in food and break them down. Digestion describes the complex process that enables the nutrients in food to enter the body and its cells. Food contains all of the nutrients a person’s body needs for health, but large, complex compounds bind them. During digestion, the body breaks these compounds down into smaller parts. This enables them to enter cells, providing energy and other benefits.

https://www.medicalnewstoday.com/articles/320014