Bile Juice : Bile jiuce is a secretion of liver that is stored in sac called the gall bladder.
Functions of Bile : The bile plays an important role in the digestion of fats.
Pancreas : The pancreas is a large cream coloured gland located just below the stomach.
Functions of Pancreas :
(i) The pancreatic juice acts on carbohydrates and proteins and changes them into simpler forms.
Absorption : Digested food is obsorbed by the wall of the intestine and passes into the blood vessels. This process is called absorption.
Villi : The inner walls of the small intestine have thousands of finger-like outgrowths. These are called villi.
Functions of Villi :
(i) The villi increases the surface area for absorption of the digested food.
(ii) Each villus has a network of thin and small blood vessels close to
its surface.
(iii) The surface of the villi also absorbs the digested food materials.
Assimilation : The absorbed substances are transported via the blood vessels to different organs of the body where they are used to build complex substances such as the proteins required by the body. This is
called assimilation.
Realising of Energy from Disgested food: In the cells, glucose breaks down with the help of oxygen into carbon dioxide and water, and energy is released.
Large intestine : The large intestine is wider and shorter than small intestine. It is about 1.5 metre in length. It starts from the end of small intestine.
Functions of Large Intestine:
(i) It absorbs water and some salts from the undigested food material.
Egestion : The faecal matter is removed through the anus from time-to-time. This is called egestion.