PPT - Chapter 2: Nutrition in Animals, Class 7, Science | EduRev Notes

 Page 1


CHAPTER - 2 
 
NUTRITION IN ANIMALS 
MADE BY-: 
 RAHAT 
Page 2


CHAPTER - 2 
 
NUTRITION IN ANIMALS 
MADE BY-: 
 RAHAT 
1) Animal nutrition :- 
   The mode of taking food by an organism and its utilisation in the body 
is called nutrition. 
  Animals get their food directly or indirectly from plants. 
  Animal nutrition :-  includes nutrient requirement, mode of taking food  
and its utilisation in the body. 
  Digestion :- The process by which complex food substances are 
broken down into simpler substances is called digestion. 
2) Different ways of taking food :- 
 
  
Name of animal Kind of food Mode of feeding 
Snail Grass Chewing 
Ant Insects Scrapping 
Eagle Flesh Swallowing 
Humming bird Nectar Sucking 
Lice Blood Sucking 
Mosquito Blood Sucking 
Butterfly Nectar Sucking 
House fly Decaying matter Brewing 
Page 3


CHAPTER - 2 
 
NUTRITION IN ANIMALS 
MADE BY-: 
 RAHAT 
1) Animal nutrition :- 
   The mode of taking food by an organism and its utilisation in the body 
is called nutrition. 
  Animals get their food directly or indirectly from plants. 
  Animal nutrition :-  includes nutrient requirement, mode of taking food  
and its utilisation in the body. 
  Digestion :- The process by which complex food substances are 
broken down into simpler substances is called digestion. 
2) Different ways of taking food :- 
 
  
Name of animal Kind of food Mode of feeding 
Snail Grass Chewing 
Ant Insects Scrapping 
Eagle Flesh Swallowing 
Humming bird Nectar Sucking 
Lice Blood Sucking 
Mosquito Blood Sucking 
Butterfly Nectar Sucking 
House fly Decaying matter Brewing 
Page 4


CHAPTER - 2 
 
NUTRITION IN ANIMALS 
MADE BY-: 
 RAHAT 
1) Animal nutrition :- 
   The mode of taking food by an organism and its utilisation in the body 
is called nutrition. 
  Animals get their food directly or indirectly from plants. 
  Animal nutrition :-  includes nutrient requirement, mode of taking food  
and its utilisation in the body. 
  Digestion :- The process by which complex food substances are 
broken down into simpler substances is called digestion. 
2) Different ways of taking food :- 
 
  
Name of animal Kind of food Mode of feeding 
Snail Grass Chewing 
Ant Insects Scrapping 
Eagle Flesh Swallowing 
Humming bird Nectar Sucking 
Lice Blood Sucking 
Mosquito Blood Sucking 
Butterfly Nectar Sucking 
House fly Decaying matter Brewing 
3) Digestion in humans :- 
  The main parts of the 
alimentary canal are :- 
buccal cavity (mouth), 
oesophagus (food 
pipe), stomach, small 
intestine, large 
intestine, rectum and 
anus. The main glands 
are :- salivary glands, 
liver and pancreas. The 
alimentary canal and 
the glands together is 
called the digestive 
system.   
Page 5


CHAPTER - 2 
 
NUTRITION IN ANIMALS 
MADE BY-: 
 RAHAT 
1) Animal nutrition :- 
   The mode of taking food by an organism and its utilisation in the body 
is called nutrition. 
  Animals get their food directly or indirectly from plants. 
  Animal nutrition :-  includes nutrient requirement, mode of taking food  
and its utilisation in the body. 
  Digestion :- The process by which complex food substances are 
broken down into simpler substances is called digestion. 
2) Different ways of taking food :- 
 
  
Name of animal Kind of food Mode of feeding 
Snail Grass Chewing 
Ant Insects Scrapping 
Eagle Flesh Swallowing 
Humming bird Nectar Sucking 
Lice Blood Sucking 
Mosquito Blood Sucking 
Butterfly Nectar Sucking 
House fly Decaying matter Brewing 
3) Digestion in humans :- 
  The main parts of the 
alimentary canal are :- 
buccal cavity (mouth), 
oesophagus (food 
pipe), stomach, small 
intestine, large 
intestine, rectum and 
anus. The main glands 
are :- salivary glands, 
liver and pancreas. The 
alimentary canal and 
the glands together is 
called the digestive 
system.   
i) The mouth and buccal cavity :-  
  Food is taken into the body through the mouth. This process is 
called ingestion. In the mouth the food is broken down into smaller 
pieces by the teeth. The mouth has salivary glands which secrete 
saliva. The saliva breaks down starch into sugars. The tongue helps 
to mix the food with saliva and swallow the food.