The superior pharyngeal constrictor assists in gaining velopharyngeal closure, while peristalticmovement of food is facilitated by the middle and inferior pharyngeal constrictors.
咽缩上肌辅助颚咽的闭锁,而咽上缩肌和咽缩中肌使食物蠕动较容易。
2
In the peristaltic pump, a plurality of rollers roll to press an elastic hose continuously, so that liquid is transported in accordance with the movement direction of the rollers.