Life Processes
- Humans, like all living things, have a set of basic requirements.
- Inputs: water, nutrients, oxygen
- Environment: heat, pressure
- These requirements form part of broader processes that are characteristic of living things.
- Movement – change in position.
- Responsiveness – reaction to a stimulus.
- Respiration – breakdown of simple nutrients to release energy.
- Digestion – breakdown of food into simpler forms.
- Absorption – passage of substances through membranes and into body fluids.
- Circulation – movement of substances in body fluids.
- Assimilation – changing of absorbed substances into chemically different forms.
- Excretion – removal of wastes produced by metabolic reactions.
- Growth – increase in size.
- Reproduction – production of new organisms.

Humans, like all living things, have a set of life processes.