Difference between respiration and combustion

We don't pay so much attention to the differences that small topics involve which in the end might be important to clear your concept. In this article we will be reading about the difference between respiration and combustion which I think you should know just so you don't get confused between the two.

Difference between respiration and combustion:

Here are 14 differences between respiration and combustion:

Respiration Combustion
1. In this process the cells and tissues are supplied oxygen which is needed for metabolic activities of the body. Combustion is a process where the substance is burned when there is presence of oxygen where the end product is light and heat.
2. Respiration occurs inside the cell Combustion is a non-cellular process
3. Respiration is a biochemical reaction Combustion is a physio-chemical reaction
4. Respiration is controlled by enzymes Combustion is not controlled by enzymes
5. Respiration involves many steps Combustion involves only one step
6. Respiration does not produce flames Combustion produces flames
7. In respiration light in not produced In combustion light is produced
8. During respiration the temperature remains constant During combustion the temperature rises
9. Respiration can occur in both aerobic or anaerobic condtions Combustion occurs only in aerobic conditions
10. Respiration helps in ATP formation There is no formation of ATP in combustion
11. There is formation of intermediate substances There is no formation of intermediate substances
12. Respiration does not require external heat Combustion requires external heating to burn the sugar molecules
13. Respiration is a slow process Combustion is a fast process
14. Respiration is a continuous process i.e it will be continue till the living organism is alive Combustion is not a continous process

What is respiration ?

Many people thinking respiration means breathing and inhaling oxygen from the environment, but that's not just it respiration includes more than just inhaling oxygen. Respiration not only lets you take oxygen in your body but it also supplies that oxygen in the blood and then from blood to the rest of your body which includes the cells and tissues of your body. 

Steps involved in respiration
Steps involved in respiration

This is a physical and chemical process. The oxygen which is given to the blood, cells and tissues is used for metabolism. There are two types of respiration which are as follows:-
  1. External respiration - This is also known as breathing. Here normal process of breathing takes place like oxygen taken into the lungs and CO2 is given out. 
  2. Internal respiration - Once the oxygen is taken it, blood supplies this oxygen with different gases to various parts of the body that is known as internal respiration. 

What is combustion ? 

We have studied combustion in chemistry and we know that combustion is a process where the substance is burned when there is presence of oxygen where the end product is light and heat. Combustion also takes place inside the human body.


Now this is common definition of combustion but do you know that there are types of combustion as well, which are as follows:-

  1. Complete combustion - The substance which gets maximum amount of oxygen while burning and can burn completely, this process is called complete combustion
  2. Incomplete combustion - The substance which does not get enough amount of oxygen where the substance is partially burnt or does not burn at all, this process is called incomplete combustion.

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