1. Catabolism: This is the breakdown of complex molecules into simpler ones, releasing energy in the process. Think of it as "breaking down" or "deconstructing" food for fuel. Examples include:

* Digestion of food

* Breakdown of glucose for energy (cellular respiration)

* Breakdown of proteins into amino acids

* Breakdown of fats into fatty acids and glycerol

2. Anabolism: This is the building up of complex molecules from simpler ones, requiring energy input. Think of it as "building up" or "constructing" molecules for growth and repair. Examples include:

* Synthesis of proteins from amino acids

* Synthesis of carbohydrates from glucose

* Synthesis of fats from fatty acids and glycerol

* Growth and repair of tissues

These two processes are constantly happening in our bodies, working together to maintain life.