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.

The digestive system is the series of tubelike organs that ... by chewing and grinding up each mouthful, while the tongue works it into a ball-shaped bolus for swallowing. Moistening saliva ...

Gut organoids mimic the stomach, small intestine, and colon in 3D. Learn how these lab-grown models are advancing digestive ...