Science

Created by: orla.x
Created on: 07-06-17 15:21

Human digestive system The food we eat has to be broken down into other substances that our bodies can use. This is called digestion. Without digestion, we could not absorb food into our bodies and use it. Digestion happens in the digestive system,

Enzymes Enzymes are not living things. They are just special proteins that can break large molecules into small molecules. Different types of enzymes can break down different nutrients: amylase and other carbohydrase enzymes break down starch into s

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Absorption and egestion These are the processes that happen in the digestive system: ingestion (eating) → digestion (breaking down) → absorption → egestion (removal from the body) Absorption Digested food molecules are absorbed in the small intesti

Adaptations for absorption Absorption across a surface happens quickly and efficiently if: the surface is thin its area is large The inner wall of the small intestine has adaptation so that substances pass across it quickly and efficiently: it has a

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