9.5 Defaecation

Question 1

Definition of defaecation :

Answer 1

Process where faeces is removed from the body .

Question 2

Large intestine is made up of ?

Answer 2

Caecum , colon and rectum

Question 3

Longest part of the large intestine is called ?

Answer 3

Colon

Question 4

Function of large intestine :
1. Re_____

Answer 4

Reabsorption of water

Question 5

Function of large intestine :
2.Syn_____

Answer 5

Synthesis of vitamins K and B12 by some bacteria in the caecum

Question 6

Function of large intestine :
3.For___

Answer 6

Formation of faeces.

Question 7

Formation of faeces :
(peristalsis , consist , movement , water, semi-solid , brown ,stored)

Answer 7

Undigested food passes into the large intestine from the small intestine by peristalsis . Undigested food consists of cellulose , fibres and excretory products such as bile pigments in fluid form . The movement of the undigested food is smoothened by the mucus secreted from the walls of the large intestine . In the rectum , the semi-solid material is called faeces . The brown colour of the faeces is due to the bile pigments in it. The faeces is tored in the rectum temporarily before it is forced out through the anus by the contraction muscles in the rectum . This process is known as defaecation .

Question 8

Definition of energy value :

Answer 8

The quantity of heat produced when one gram of food is completely oxidised .