In humans the top of the stomach is separated from the esophagus by the cardiac sphincter muscle, which normally prevents food and digestive juices from backing up the esophagus.
(the top of the stomach; is separated; from the esophagus; by the cardiac sphincter muscle; L:In humans) (the cardiac sphincter muscle; normally prevents; food and digestive juices; from backing up the esophagus) (food and digestive juices; from backing up; the esophagus)
the top of the stomach the cardiac sphincter muscle food and digestive juices
is separated normally prevents from backing up
from the esophagus by the cardiac sphincter muscle L:In humans
food and digestive juices from backing up the esophagus
the esophagus