Four processes, one body
Even when you sleep, your body is at work. It keeps repairing itself.
Step 1 of 5
- One connected chain, four boxes.
- Nutrition: food comes in.
- Respiration: energy is released.
- Transport: food and oxygen are carried around.
- Excretion: waste leaves the body.
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Read each event. Tap the life process it belongs to.
The rule
The jobs that keep a body working are life processes. Living things need outside energy to repair themselves. They need raw materials to grow.
Life processes keep a body in repair. Nutrition brings in food. Respiration releases the food’s energy. Transport carries things around. Excretion removes harmful wastes.
| Process | What it does |
|---|---|
| Nutrition | Brings food into the body |
| Respiration | Releases energy from food |
| Transport | Carries food, oxygen and wastes |
| Excretion | Removes harmful wastes |
In a tiny one-celled living thing, the whole surface touches the surroundings. In a large body, most cells do not. Diffusion is the slow spreading of a substance. It moves from where there is more to where there is less. Diffusion is too slow to supply those inner cells. So large bodies need transport.