The document discusses life processes, which are the basic functions that allow living organisms to survive on Earth. It specifically focuses on nutrition, describing the three main modes of nutrition: autotrophic, heterotrophic, and holozoic. Autotrophs, like plants, can produce their own food through photosynthesis, while heterotrophs obtain nutrition from other organisms. The document also provides details on nutrition in plants, animals, and humans, explaining how each group meets their nutritional needs.

1. 
Life Process

2. 
The basic functions performed by living organisms to
maintain their life on this earth are called life processes
 Life Processes includes:
 Nutrition
 Respiration
 Transportation
 Excretion
 Growth
What Are Life Processes

3. 
 The process of taking in food and utilizing it is called
nutrition.
 The term ‘nutrition’ comes from the word ‘nutrient’.
 A nutrient is an organic or inorganic substance required
for the maintenance of life and survival of a living
organism.
 The food taken in by an organism contains a large
number of nutrients like carbohydrates, fats, proteins
Nutrition

4. 
 Autotrophic
 1. Photosynthesis
 2. Chemosynthesis
 Heterotrophic
 1. Parasitic
 2. Holozoic
 3. Saprophytic
Mode of Nutrition

5. 
Autotrophic
 The word ‘auto’ means ‘self’ and ‘trophe’ means
‘nutrition’.
 Autotrophic nutrition is that mode of nutrition in
which an organism makes its own food from the
simple organic materials like carbon dioxide and
water present in the surroundings (with the help of
sunlight energy)
 Those organisms which can make their own food
from carbon dioxide and water are called autotrophs.

6. 
Heterotrophic
 The word ‘heteros’ means ‘other’ and ‘trophe’ means
nutrition, thus heterotrophic means nutrition
obtained from others.
 All animals have a heterotrophic mode of nutrition.
 Those organisms which cannot make their own food
from inorganic substance like carbon dioxide and
water depend on other organism for their food are
called heterotrophs.
 They are of 3 types: Parasitic, Holozoic & Saprophytic

7. 
 Green plant are autotrophs and synthesis their own
food by the process of photosynthesis.
 ‘Photo’ means light and ‘synthesis’ means build, thus
photosynthesis means ‘build up by light’.
 The process by which green plants make their own
food from carbon dioxide and water by using
sunlight energy in the presence of chlorophyll is
called photosynthesis.
 Raw material required are carbon dioxide and water.
 Oxygen gas is released during photosynthesis.
Nutrition in Plants

8. 

9. 
 Animals obtain their food from plants and animals
thus are heterotrophs.
 Animals can be divided into three groups on the
basis of their food habits:
 Herbivores
 Carnivores
 Omnivores
Nutrition in Animals

10. 
 The nutrition in human beings takes place through
human digestive system
 The human digestive system consists of the alimentary
canal and its associated glands.
 The various organs of the human digestive system in
sequence: Mouth, Oesophagus, Stomach, Small Intestine,
and Large Intestine.
 The glands which are associated with the human
digestive system and form a part of the human digestive
system are: Salivary Glands, Liver, and Pancreas.
Nutrition in Humans

11. 

12. 
Efforts by: Arpit Mathur
Gurkirat Kaur
Aman Singh