The muscular ring that keeps food in the stomach from going back into the esophagus is ________
A) the celiac trunk
B) LES
C) chyme
D) peristalsis
B
Explanation: A) This is an artery, not a muscular ring.
B) Correct! The lower esophageal sphincter (LES) prevents food in the stomach from going back into the esophagus.
C) Chyme is undigested food, not a muscular ring.
D) Peristalsis is smooth muscle contraction, not a muscular ring.
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Fill in the blank(s) with correct word