The Digestive System

The digestive system brings nutrients into the body.  The five basic processes of digestion are motility, secretion, digestion, absorption, and excretion.

The mouth processes food for swallowing.  The 32 teeth cut, tear, grind, and crush food.

The pharynx and esophagus deliver food to the stomach. 

The stomach stores food, digests protein, and regulates delivery.

Accessory organs aid in digestion and absorption.  The pancreas secrete digestive enzymes into the small intestine, the liver produces bile, and the gallbladder store bile from the liver.

The large intestine absorbs nutrients and eliminates wastes .  Defecation can be overridden by conscious control and the waste particles exit by way of the rectum and anus.

Reference:

Johnson, M. D. (2010). Human Biology: Concepts and Current Issues (5th ed.). San Francisco: Pearson Education.