Question

1. food is broken down mechanically in the oral cavity by:

a. teeth
b. tongue
c. saliva
d. a and b

Explanation:

• Teeth: They chew and grind food, which is a mechanical breakdown process.
• Tongue: It helps in moving the food around in the mouth for better chewing (mechanical aspect).
• Saliva: It has enzymes (like amylase) that start chemical digestion, not mechanical.

Answer:

d. a and b