The stomach is a greatly dilated segment of the digestive tract whose main functions are:

  1. To continue the digestion of carbohydrates initiated by the amylase of saliva.

  2. To add an acidic fluid to the ingested food and mixing its contents into a viscous mass called chyme by the churning activity of the muscularized.

  3. To begin digestion of triglycerides by a secreted lipase.

  4. To promote the initial digestion of proteins with the enzyme pepsin.