Respiration Circulation and excretion

By now you have learnt that a number of important life processes continuosly take place within the body of is a living organism it is because of these life processes that organisms remainalive. The activities which keep an organism alive are nutrion growth respiration transportation and irritating etc you have already leam about nutrition let us read about respirator transportation of substances and excretion.

                        Why do we. Respire?

Our body needs energy for its various as activites.

This energy is produced in our body from the food we take the food we take has so stored chemical energy in it this energy is released when food is digested and the components of the digested food react with oxygen in the cell this process is called respiration. Therefore we respire to produce energy needed by the body for its various activities. To get oxygen we need to :

Breathe fresh air rich in oxygen. 

Transport the inhaled oxygen from respiratory organs to every call in the body.