Metabolism refers to all the physical and chemical processes in the body that convert or use energy, such as:
- Circulating blood
- Controlling body temperature
- Contracting muscles
- Digesting food and nutrients
- Eliminating waste through urine and feces
- Functioning of the brain and nerves
Tortora GJ, Derrickson BH. Metabolism. In: Tortora GJ, Derrickson BH, eds. Principles of Anatomy and Physiology. 14th ed. Hoboken, NJ: John Wiley & Sons; 2014:chap 25.