Metabolism

Definition

Metabolism refers to all chemical reactions involved in maintaining the living state of cells and organisms. It can be divided into two categories - catabolism (breaking down molecules) and anabolism (building up molecules).

Related terms

Anabolism: Constructive metabolism; the synthesis in living organisms of more complex substances from simpler ones.

Catabolism: Destructive metabolism; the breaking down in living organisms of more complex substances into simpler ones, with release of energy.

Homeostasis:

The tendency towards a relatively stable equilibrium between interdependent elements, especially as maintained by physiological processes.