Life Processes (Chapter 6) - PPT, Class 10 Science PDF Download

 Page 1


*CHAPTER - 6 
 
LIFE PROCESSES 
MADE BY-: 
 RAHAT 
Page 2


*CHAPTER - 6 
 
LIFE PROCESSES 
MADE BY-: 
 RAHAT 
    The most important criteria to decide whether something is alive is 
movement. All living things move without the help of any external help. 
Some movements are easily visible like the movements of body parts. 
Some movements are not easily visible like molecular movements. The 
molecular movements in cells and tissues is necessary for all life 
processes. 
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* 1) Criteria to decide whether something is alive :-
Page 3


*CHAPTER - 6 
 
LIFE PROCESSES 
MADE BY-: 
 RAHAT 
    The most important criteria to decide whether something is alive is 
movement. All living things move without the help of any external help. 
Some movements are easily visible like the movements of body parts. 
Some movements are not easily visible like molecular movements. The 
molecular movements in cells and tissues is necessary for all life 
processes. 
© Galaxysite.weebly.com - All Rights Reserved 
* 1) Criteria to decide whether something is alive :-
     Life processes are the basic processes in living organisms which are 
necessary for maintaining their life. The basic life processes are – 
nutrition, respiration, transportation, and excretion. 
  i) Nutrition :– is the process of taking food by an organism and its 
utilization by the body for life processes. 
 ii) Respiration :– is the process by which food is burnt in the cells of the 
body with the help of oxygen to release energy. 
iii) Transportation :– is the process by which food, oxygen, water, waste 
products are carried from one part of the body to the other, 
iv) Excretion :- is the process by which waste products are removed 
from the body.   
© Galaxysite.weebly.com - All Rights Reserved 
* 2) Life processes :- 
Page 4


*CHAPTER - 6 
 
LIFE PROCESSES 
MADE BY-: 
 RAHAT 
    The most important criteria to decide whether something is alive is 
movement. All living things move without the help of any external help. 
Some movements are easily visible like the movements of body parts. 
Some movements are not easily visible like molecular movements. The 
molecular movements in cells and tissues is necessary for all life 
processes. 
© Galaxysite.weebly.com - All Rights Reserved 
* 1) Criteria to decide whether something is alive :-
     Life processes are the basic processes in living organisms which are 
necessary for maintaining their life. The basic life processes are – 
nutrition, respiration, transportation, and excretion. 
  i) Nutrition :– is the process of taking food by an organism and its 
utilization by the body for life processes. 
 ii) Respiration :– is the process by which food is burnt in the cells of the 
body with the help of oxygen to release energy. 
iii) Transportation :– is the process by which food, oxygen, water, waste 
products are carried from one part of the body to the other, 
iv) Excretion :- is the process by which waste products are removed 
from the body.   
© Galaxysite.weebly.com - All Rights Reserved 
* 2) Life processes :- 
   Nutrition is the process of taking food by an organism and its 
utilisation by the body to build the body, for growth, to repair the 
damaged parts of the body and for energy. 
  Life on earth depends on carbon based molecules and most of the 
food are also carbon based molecules. The outside raw materials used 
by living organisms are food, water and air. 
a) Modes of nutrition :- There are two main modes of nutrition. They 
are autotrophic nutrition and heterotrophic nutrition. 
i) Autotrophic nutrition :- is nutrition in which organisms prepare their 
own food from simple inorganic substances like carbon dioxide and 
water in the presence of sunlight and chlorophyll. 
  Eg :- all green plants and some bacteria. 
ii) Heterotrophic nutrition :- is nutrition in which organisms get their 
food directly or indirectly from plants. 
  Eg :- all animals fungi and some bacteria. 
b) Types of heterotrophic nutrition :- There are three main types of 
heterotrophic nutrition. They are saprophytic, parasitic and holozoic 
nutritions. 
 
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* 3) Nutrition :- 
Page 5


*CHAPTER - 6 
 
LIFE PROCESSES 
MADE BY-: 
 RAHAT 
    The most important criteria to decide whether something is alive is 
movement. All living things move without the help of any external help. 
Some movements are easily visible like the movements of body parts. 
Some movements are not easily visible like molecular movements. The 
molecular movements in cells and tissues is necessary for all life 
processes. 
© Galaxysite.weebly.com - All Rights Reserved 
* 1) Criteria to decide whether something is alive :-
     Life processes are the basic processes in living organisms which are 
necessary for maintaining their life. The basic life processes are – 
nutrition, respiration, transportation, and excretion. 
  i) Nutrition :– is the process of taking food by an organism and its 
utilization by the body for life processes. 
 ii) Respiration :– is the process by which food is burnt in the cells of the 
body with the help of oxygen to release energy. 
iii) Transportation :– is the process by which food, oxygen, water, waste 
products are carried from one part of the body to the other, 
iv) Excretion :- is the process by which waste products are removed 
from the body.   
© Galaxysite.weebly.com - All Rights Reserved 
* 2) Life processes :- 
   Nutrition is the process of taking food by an organism and its 
utilisation by the body to build the body, for growth, to repair the 
damaged parts of the body and for energy. 
  Life on earth depends on carbon based molecules and most of the 
food are also carbon based molecules. The outside raw materials used 
by living organisms are food, water and air. 
a) Modes of nutrition :- There are two main modes of nutrition. They 
are autotrophic nutrition and heterotrophic nutrition. 
i) Autotrophic nutrition :- is nutrition in which organisms prepare their 
own food from simple inorganic substances like carbon dioxide and 
water in the presence of sunlight and chlorophyll. 
  Eg :- all green plants and some bacteria. 
ii) Heterotrophic nutrition :- is nutrition in which organisms get their 
food directly or indirectly from plants. 
  Eg :- all animals fungi and some bacteria. 
b) Types of heterotrophic nutrition :- There are three main types of 
heterotrophic nutrition. They are saprophytic, parasitic and holozoic 
nutritions. 
 
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* 3) Nutrition :- 
i) Saprohytic nutrition :- is nutrition in which organisms get their food 
from dead and decaying organisms. They break down the food material 
outside their body and then absorbs it. Eg :- mushroom, bread mould, 
yeast, some bacteria etc. 
 ii) Parasitic nutrition :- is nutrition in which organisms get their food 
from living organisms (host) without killing them. Eg :- cuscuta, orchids, 
ticks, lice, leeches, round worm, tape worm, plasmodium etc. 
iii) Holozoic nutrition :- is nutrition in which organisms take food 
directly and then digests and absorbs it. Eg :- amoeba, paramaecium, 
birds, fishes, humans etc. 
 
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