Difference between revisions of "Digestion"
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:[https://www.amazon.co.uk/gp/product/0008158754/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0008158754&linkCode=as2&tag=nrjc-21&linkId=27ad53b0283feeff7fc5ae04a9e205f222 ''Digestion, pages 100-103, 170, GCSE Biology; Student Book, Collins, AQA ''] | :[https://www.amazon.co.uk/gp/product/0008158754/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0008158754&linkCode=as2&tag=nrjc-21&linkId=27ad53b0283feeff7fc5ae04a9e205f222 ''Digestion, pages 100-103, 170, GCSE Biology; Student Book, Collins, AQA ''] | ||
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+ | ====Edexcel==== | ||
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+ | :[https://www.amazon.co.uk/gp/product/1292120207/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120207&linkCode=as2&tag=nrjc-21&linkId=22455ff53961978667722edaa64c0be5 ''Digestion, specialised cells for, page 8, GCSE Biology, Pearson, Edexcel ''] | ||
+ | :[https://www.amazon.co.uk/gp/product/1292120193/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120193&linkCode=as2&tag=nrjc-21&linkId=572df39392fb4200db8391d98ae6314e ''Digestion, specialised cells for, page 8, GCSE Combined Science, Pearson Edexcel ''] |
Revision as of 15:14, 17 November 2019
Contents
Key Stage 3
Meaning
Digestion is breaking down food into smaller pieces so it can be absorbed into the blood stream.
About Digestion
- Digestion is done by the digestive systems of animals.
About Digestion in Humans
- Digestion begins in the mouth where teeth break the food into smaller pieces.
- It continues in the stomach where chemicals known as enzymes are added to break down large molecules into smaller ones.
- Digestion then continues in the small intestine where large molecules continue to be broken down.
- Finally, when the molecules are small enough, the small intestine absorbs the nutrients into the blood stream.
Key Stage 4
Meaning
Digestion is the process of breaking down large insoluble molecules in food into small soluble molecules that can be absorbed into the blood stream.
About Digestion
- There are two main types of digestion; mechanical digestion which is to break food down by a mechanical process like chewing and chemical digestion which is to break down large molecules into smaller ones using enzymes.
About Digestion in Humans
- Digestion begins in the mouth where teeth break the food into smaller pieces in a process called mastication.
- Digestion continues in the stomach where digestive enzymes are added to break down large insoluble molecules into smaller soluble ones.
- Digestion then continues in the small intestine where large molecules continue to be broken down by digestive enzymes.
- Finally, when the molecules are small enough, the small intestine absorbs the nutrients into the blood stream.