Functions of Different Parts of Human Digestive System

Digestive system is a system of organs and glands which are involved in obtaining food, its crushing, digestion, absorption, assimilation and egestion of indigestible matter.

The digestive system of a mammal consists of alimentary canal (digestive tract) and associated glands. The alimentary is long tube of 8-10 meters in length. It includes the following structures: Mouth and buccal cavity, Oesophagus, stomach, small intestine and large intestine. Associated glands are those glands which secrete digestive juices for the digestion of food. Associated glands are salivary glands, gastric glands, liver, pancreas, and intestinal glands.

Parts	Functions
Buccal cavity	Ingestion, Mastication
Pharynx	Swallowing
Oesophagus	Links pharynx to stomach
Stomach	Food Storage and digestion of proteins
Duodenum	Digestion and absorption
Ileum	Completion of digestion and absorption of food
Colon	Absorption of water
Rectum	Formation and storage of faeces
Anus	Egestion
Salivary glands	Lubrication of food, partial digestion food.
Gastric glands	Gastric juice are secreted by gastric glands
Liver	Emulsification of fats
Pancreas	Digestion of starch, proteins and fats