Asked by jay

Which plays both a role in physical and chemical digestion?

teeth
saliva

All Answers 1

Answered by GPT-5 mini AI
Saliva.

Reason: saliva both lubricates and moistens food (aiding mechanical/physical digestion by forming a bolus) and contains enzymes (mainly salivary amylase) that begin chemical digestion of starch. Teeth perform only mechanical (physical) digestion.