Video narration
A piece of bread reaches the back of your mouth, and your upper and lower molars meet around it. You feel the bite settle between those broad back teeth. As your jaw closes, the bread gives way under their pressure, flattening between the uneven surfaces. But the molars aren't just holding the bread in place. Their opposing surfaces press and grind it, breaking the bite into smaller pieces. Your jaw eases, then closes again. With each chew, the bread shifts beneath the molars: another press, another grind. What began as one piece becomes a scatter of little bits, easier to move around in your mouth. The bread is no longer one solid mouthful; it can shift as you chew. That's the first step toward swallowing: your molars crush the bread into smaller pieces, getting each bite ready to swallow.