Energy is released during the decomposition of complex substances in the process.

Energy. That, without which no living organism is able to live. Each species receives it in its own way. The human body, on the other hand, receives energy from the decomposition of complex substances, their oxidation in the process of metabolic decay. This process proceeds with the subsequent formation of thermal energy and ATP molecules. These molecules are a universal source of energy for all biochemical processes in our body. The combination of all these processes is called catabolism or energy metabolism.