| Ingestion | intake of food | mouth |
|---|---|---|
| Digestion | • break down of large molecules → small | |
| • rely on digestive enzymes | ||
| • mechanical/ chemical | • mouth | |
| • stomach, small intestine | ||
| Absorption | • entrance of food (nutrients) into bloodstream | |
| • diffusion/ active transport | • main: small intestine | |
| • some: stomach, large intestine | ||
| Assimilation | • nutrients are taken up | |
| • used in building new tissues | ||
| • transportation of nutrients | all over the body | |
| Egestion | • removal of undigested food/ unabsorbed waste | |
| → faeces | ||
| • x excretory process | anus |