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edits
Changes
→Key Stage 4
: The [[mouth]] has [[Salivary Gland|salivary glands]] which makes the food moist so it is easier to swallow.
: The [[saliva]] also contains an [[enzyme]] called [[amylase]] which begins the [[Chemical Digestion|chemical digestion]] of [[starch]] into shorter [[molecule]]s.
: The [[saliva]] has a [[pH]] of between 6.2 and 7.4 to provide the [[optimum]] [[pH]] for the [[amylase]] which works best at [[pH]] 6.7.