Nutritive sucking involves coordination of which structures?

• A. Jaw, teeth, cheeks, tongue
• B. Lips, cheeks, tongue
• C. Jaws only
• D. None of the above

Answer: (A)

Nutritive sucking relies on a coordinated action of several oral structures to create suction, seal the oral cavity around the nipple, and move liquid efficiently. The jaw provides the rhythmic opening and closing that drives the cycle, while the lips must form a tight seal to contain pressure. The tongue positions and elevates or compresses the nipple to help generate forward flow and guide the liquid, and the cheeks work with the lips to maintain the seal and provide lateral stability for effective pressure transmission. Teeth are part of the mouth’s architecture and, although not the primary movers in sucking, their presence supports the overall stability and control of the oral cavity during feeding. This combination best captures the multiple structures that coordinate during nutritive sucking, whereas focusing on only the jaws or omitting key parts would miss important contributors to the process.