Biological processes such as photosynthesis, respiration, absorption of mineral salts, diffusion, osmosis, imbibition, plasmolysis etc. take place in the plant body. A lot of heat is generated in all these biological processes. If these heat accumulates in the plant body, the biochemical work would be disrupted. If there is too much heat, the plant will burn to death. During transpiration, water evaporates through the stomata. Water flow is created in the plant body. Heat from different cells flows with water. As the water evaporates, heat is also released. The more the sensation, the more heat is released. Heat balance is maintained throughout the plant body. Thus, respiration regulates the temperature of the plant body.