Respiration

The process of releasing energy from food or a aliment is called respiration.

We have just know that digested food is assimilated into the body of the living organisms. The assimilated food is used for mainly 2 (two) purposes :-

  • Assimilated food is used as a fuel (source) to get energy for various life processes, and
  • Assimilated food is used as a material for the growth of the organism and repair of the body.

We will now describe how energy is released from the food which is absorbed at and assimilated in the cells of the body. Please note that food is the ‘fuel’ for energy (power) production in cells. Let us see how energy is actually obtained.

All the living things need oxygen (of air) to obtain energy from food. This oxygen (air) reacts with the food molecules (like glucose) present in the body cells and burns them slowly to release energy. The energy thus released is stored in ATP molecules in the cells. The body can use this stored energy in the form of ATP and ADP molecules whenever it wants to do so.

The process of releasing energy from food or a aliment is called respiration. When oxygen burns the food in the cell of the body to release energy, then carbon dioxide and water are produced as waste products which are to be eliminated from the body. The process of respiration involves taking in oxygen into the cells of the body, using it for releasing energy by burning food, and then eliminating the waste products (carbon dioxide and water) from the body. The process of respiration can be written in the form of a given below word equation as follows :

Food + Oxygen -> Carbon dioxide + Water + Energy

simpler substance from air CO2 O2 In the form of ATP

The process of respiration which releases energy will be takes place inside the cells of the body. So, it is also known as cellular respiration. The process of cellular respiration or more than one cell respiration is common to all the living organisms. It provides energy to the cells. There are two by-products obtain from cellular respiration: carbon dioxide and water. Out of these only carbon dioxide is considered the real waste product of respiration because its accumulation in the body is harmful to the organisms. The water that produced during this process is not harmful to the body. It is rather beneficial for the body. Please note that the respiration process is essential for life because it provides energy for carrying out all the life processes which are necessary to keep the organisms alive.

Types of Respiration :

34 thoughts on “Respiration”

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