Biology for IGCSE & O level - Human Nutrition (Section 7 - No. 21)
What is the role of the tongue in the process of digestion?
To produce saliva.
To break down food into smaller pieces.
To mix food with saliva and form a bolus.
To absorb nutrients from the food.
Explanation
The tongue mixes the food with saliva, and forms the bolus to be swallowed.
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