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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===
: 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.