Animation illustrating the human digestive system, highlighting the intestines with a zoom effect on a blue grid background Royalty-free licenses let you pay once to use copyrighted images and video ...

This film explores the complex process of human digestion, detailing how food is broken down into molecules by the digestive system. It follows the journey of food from the mouth, where it is chewed ...

A group of researchers has reached deep into the human gut, plucked out a couple enzymes produced by bacteria residing there and determined their biological activities and molecular structures -- ...