• Small Intestine is highly coiled and is about 7.5 metres long.
  • It secretes a digestive juice known as the Intestinal juice .
  • This intestinal juice breaks starch carbohydrate into sugar known as the Glucose and proteins into Amino acids .


How is Absorption and Assimilation done in the Small intestine?

  • After the pancreatic juice acts on carbohydrates, fat and proteins, the digested food passes into the blood vessels in the wall of the intestine.
  • This process is called Absorption .
  • The inner wall of the small intestine has many finger-like outgrowths called villi .
  • These increase the surface area of the small intestine, hence increasing absorption .
  • The absorbed substances are transported via the blood vessels to the organs in the body.
  • These are used to build complex substances such as proteins required by the body.
  • This process is called Assimilation .
Ask a doubt
Maninder Singh's photo - Co-founder, Teachoo

Made by

Maninder Singh

CA Maninder Singh is a Chartered Accountant for the past 14 years and a teacher from the past 18 years. He teaches Science, Economics, Accounting and English at Teachoo