What are the two main functions of the teeth?

• A. To break down food and form the mouth
• B. To aid in speaking and chew food
• C. To digest food in the stomach
• D. To filter waste from the body

Answer: (A)

Teeth serve two primary roles: they physically break down food through chewing, and they help shape the mouth’s structure. Chewing reduces food to smaller pieces and creates a larger surface area for digestive enzymes, making swallowing easier and digestion more efficient. At the same time, the teeth contribute to the mouth’s form—the alignment and height of the teeth support lip shape and facial contours, which influence how we speak and articulate sounds. That combination of mechanical processing of food and structural support for the mouth explains why this option best captures the two main functions. Digestion occurs in the stomach, and waste filtering is done by the kidneys, so those choices don’t describe teeth.