11th Class Biology Respiration In Plants Phases Of Respiration

Phases Of Respiration

Category : 11th Class

There are three phases of respiration :

(1) External respiration : It is the exchange of respiratory gases (\[{{O}_{2}}\]and\[C{{O}_{2}}\]) between an organism and its environment.

(2) Internal or Tissue respiration : Exchange of respiratory gases between tissue and extra cellular environment .

Both the exchange of gases occur on the principle of diffusion.

(3) Cellular respiration : It is an enzymatically-controlled stepped chemical process in which glucose is  oxidised inside the mitochondria to produce energy-rich ATP  molecules with high-energy bonds.

So, respiration is a biochemical process.

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