Changes

The [[mouth]] is an [[organ]] in both the [[Breathing System|breathing system]] and the [[Digestive System|digestive system]].

: The [[mouth]] contains [[teeth]] for the [[Mechanical Digestion|mechanical digestion]] of food known as [[mastication]].

: The [[mouth]] has [[Salivary Gland|salivary glands]] which makes the food moist so it is easier to swallow.

: The [[saliva]] also contains a [[Digestive Enzyme|digestive enzyme]] called [[Salivary Amylase|salivary amylase]] which begins the [[Chemical Digestion|chemical digestion]] of [[starch]] into [[maltose]].

: The [[saliva]] has a [[pH]] of between 6.2 and 7.4 to provide the [[optimum]] [[pH]] for the [[Salivary Amylase|salivary amylase]] which works best at [[pH]] 6.7.