The process of release of energy from the assimilated food is called respiration. Depending upon the availability of oxygen, respiration is of two types :
1. Aerobic respiration : It occurs in the presence of oxygen.
2. Anaerobic respiration : It occurs in the absence of oxygen.
1. Aerobic respiration : It occurs in the presence of oxygen.
2. Anaerobic respiration : It occurs in the absence of oxygen.