Biology: Digestion

Set of review cards on the topic of 'The Digestive System'

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  • Created by: Kelly
  • Created on: 14-03-11 19:40


Food swallowed --- passes along alimentary canal (tube running from mouth to anus)

The processes involved  are:

1. Ingestion; taking food in

2. Digestion; the break down of food into small, soluble molecules

3. Absorption; in to the bloodstream for distribution

4. Assimilation; the use of absorbed food materials in the cell

5. Egestion; removal of undigested food as faeces

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The breakdown of food can be physical e.g. teeth, churning and mixing

or chemical e.g. enzymes:

CHO ------ (amylase) ----- glucose

fats -------- (lipase)---------fatty acids and glycerol

proteins -- (protease) ---- amino acids

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