What are all the components of the digestive system?

1 Answer
Aug 4, 2016

Digestive system consists of digestive tract and associated organs like salivary glands, liver and pancreas.


The digestive tract in a mammal starts with mouth and ends in anus.

The tract is serially divided in:

Oral cavity
Small Intestine
Large Intestine.

  • There are teeth and tongue inside oral cavity. This continues in oesophagus through a common passage (for both air and food) called pharynx.
  • Stomach is divided in fundus, corpus and pylorus.
  • Small intestine is divided in duodenum, jejunum, ileum.
  • Large intestine is divided in caecum, colon and rectum.


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  • There are three pair of salivary glands: sublingual, submaxillary and parotid which secrete saliva, an enzymatic lubricating fluid in oral cavity.
  • Liver juice is stored in a sac called Gall Bladder and released in duodenum. The juice is called bile, which is nonenzymatic but most important for fat digestion.
  • Pancreas also secretes its enzymatic juice in duodenum.