Saliva Starts Digesting Starch in Your Mouth

Transit time varies from person to person and depends on diet and health.

These microbes help break down food, make some vitamins and interact with the immune system.

From mouth to anus, the tube that processes food is several times longer than the person it belongs to.

Rhythmic contractions push food through the esophagus and intestines, which is why swallowing works even upside down.