Entry of food from the esophagus into the stomach is controlled by a ring of muscles known as the cardiac sphincter.

食物从食管进入胃的过程被一系列称为贲门括约肌的肌肉控制 。

The cardiac sphincter relaxes and contracts to move food from the esophagus into the stomach, whereas the pyloric sphincter allows food to leave the stomach when it has sufficiently digested.

贲门括约肌通过舒张和收缩将食物从食道移动到胃中，而当食物被充分消化后，幽门括约肌通过舒张和收缩使其离开胃。