Respiration in Organisms Class 7 PPT

 Page 1


WHY DO WE 
RESPIRE?
• All the living organisms 
are made up of small 
microscopic units called 
the cells.
• These cells have different 
functions to perform in 
these organisms such as 
digestion, respiration, 
transportation and 
excretion.
Page 2


WHY DO WE 
RESPIRE?
• All the living organisms 
are made up of small 
microscopic units called 
the cells.
• These cells have different 
functions to perform in 
these organisms such as 
digestion, respiration, 
transportation and 
excretion.
• The cells can perform this 
function only if they get the 
energy to do so.
• Hence, all living organisms 
need food which gives them 
the required energy.
• The energy present in the 
food gets released when the 
organisms respire or breathe.
Page 3


WHY DO WE 
RESPIRE?
• All the living organisms 
are made up of small 
microscopic units called 
the cells.
• These cells have different 
functions to perform in 
these organisms such as 
digestion, respiration, 
transportation and 
excretion.
• The cells can perform this 
function only if they get the 
energy to do so.
• Hence, all living organisms 
need food which gives them 
the required energy.
• The energy present in the 
food gets released when the 
organisms respire or breathe.
CELLULAR 
RESPIRATION
Cellular respiration can be defined as 
the process in which the food that we 
eat is broken down inside the cells 
which results in the release of energy.
All the cells in living organisms 
undergo cellular respiration.
Page 4


WHY DO WE 
RESPIRE?
• All the living organisms 
are made up of small 
microscopic units called 
the cells.
• These cells have different 
functions to perform in 
these organisms such as 
digestion, respiration, 
transportation and 
excretion.
• The cells can perform this 
function only if they get the 
energy to do so.
• Hence, all living organisms 
need food which gives them 
the required energy.
• The energy present in the 
food gets released when the 
organisms respire or breathe.
CELLULAR 
RESPIRATION
Cellular respiration can be defined as 
the process in which the food that we 
eat is broken down inside the cells 
which results in the release of energy.
All the cells in living organisms 
undergo cellular respiration.
The cellular respiration takes 
place in a cell organelle 
called mitochondria.
The oxygen that an organism 
breathes in reacts with 
the carbohydrates (glucose) 
present in the food and results 
in the release of carbon 
dioxide, water and energy.
Page 5


WHY DO WE 
RESPIRE?
• All the living organisms 
are made up of small 
microscopic units called 
the cells.
• These cells have different 
functions to perform in 
these organisms such as 
digestion, respiration, 
transportation and 
excretion.
• The cells can perform this 
function only if they get the 
energy to do so.
• Hence, all living organisms 
need food which gives them 
the required energy.
• The energy present in the 
food gets released when the 
organisms respire or breathe.
CELLULAR 
RESPIRATION
Cellular respiration can be defined as 
the process in which the food that we 
eat is broken down inside the cells 
which results in the release of energy.
All the cells in living organisms 
undergo cellular respiration.
The cellular respiration takes 
place in a cell organelle 
called mitochondria.
The oxygen that an organism 
breathes in reacts with 
the carbohydrates (glucose) 
present in the food and results 
in the release of carbon 
dioxide, water and energy.