Dear Student,
The term tissue respiration is a step in respiration in which exchange of gases between blood and tissue takes place. It denotes the exchange of respiratory gases within an aggregation of cells in the course of the biological oxidation of nutrients. It is the metabolic process by which living cells absorb oxygen and release carbon dioxide. The oxygen received by the cells from the capillary blood is consumed in oxidative metabolism, and at the same time the metabolic end product carbon dioxide is released into the capillary blood