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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