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==Key Stage 3==
===Meaning===
[[File:DigestiveSystemDiagram.png|right|300px|thumb|[[Digestion]] in [[human]]s takes place in the [[Digestive System|digestive system]].]]
[[Digestion]] is breaking down food into smaller pieces so it can be [[Absorb (biology)|absorbed]] into the [[blood]] stream.
===About Digestion===
: [[Digestion]] is done by the [[Digestive System|digestive systems]] of [[animal]]s.
===About Digestion in Humans===: [[Digestion]] begins in the [[mouth]] where [[teeth]] break the food into smaller pieces.: It continues in the [[stomach]] where [[chemical]]s known as [[enzyme]]s are added to break down large [[molecule]]s into smaller ones.: [[Digestion]] then continues in the [[Small Intestine|small intestine]] where large [[molecule]]s continue to be broken down.: Finally, when the [[molecule]]s are small enough, the [[Small Intestine|small intestine]] [[Absorb (biology)|absorbs]] the [[nutrient]]s into the [[blood]] stream.
===Meaning===
[[Digestion]] is the process of breaking down large [[insoluble]] [[molecule]]s in food into small [[soluble]] [[molecule]]s that can be [[Absorb (biology)|absorbed]] into the [[blood]] stream.
===About Digestion===
: There are two main types of '''digestion'''; [[Mechanical Digestion|mechanical digestion]] which is to break food down by a mechanical process like chewing and [[Chemical Digestion|chemical digestion]] which is to break down large [[molecule]]s into smaller ones using [[Digestive Enzyme|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 Enzyme|digestive enzyme]]s are added to break down large insoluble [[molecule]]s into smaller [[soluble]] ones.
: [[Digestion]] then continues in the [[Small Intestine|small intestine]] where large [[molecule]]s continue to be broken down by [[Digestive Enzyme|digestive enzyme]]s.
: Finally, when the [[molecule]]s are small enough, the [[Small Intestine|small intestine]] [[Absorb (biology)|absorbs]] the [[nutrient]]s into the [[blood]] stream.
===References===
====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 '']
====Edexcel====
:[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 '']
====OCR====
:[https://www.amazon.co.uk/gp/product/0198359810/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359810&linkCode=as2&tag=nrjc-21&linkId=d768d99f1a06f7c12fab40e5aef85a55 ''Digestion, pages 38-39, 63, 73, Gateway GCSE Biology, Oxford, OCR '']