'Digestion begins in the mouth, where this secretion breaks down starches into sugars'
saliva
THE HUMAN BODY: Digestion begins in the mouth, where this secretion breaks down starches into sugars
Digestion begins in the mouth, where this secretion breaks down starches into sugars
Digestion begins in the mouth, where this secretion breaks down starches into sugars
THE HUMAN BODY
saliva
THE HUMAN BODY