Metabolism is a complex process that involves all the chemical reactions that occur within your body to sustain life. It can be broadly divided into two categories:

* Anabolism: Building up of complex molecules from simpler ones, requiring energy input (e.g., protein synthesis, bone growth).

* Catabolism: Breaking down of complex molecules into simpler ones, releasing energy (e.g., digestion, cellular respiration).

Metabolism encompasses a vast array of chemical reactions, including:

* Digestion: Breaking down food into smaller molecules.

* Cellular respiration: Extracting energy from food molecules.

* Protein synthesis: Building proteins from amino acids.

* Hormone production: Producing chemical messengers for various bodily functions.

* DNA replication: Copying genetic material for cell division.

* Waste removal: Eliminating unwanted products from the body.

These reactions are crucial for all aspects of life, from growth and development to maintaining body temperature and fighting off infections.