Which structure prevents the backflow of food from the stomach into the esophagu

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Question: Which structure prevents the backflow of food from the stomach into the esophagus?

Options:

Correct Answer: Lower esophageal sphincter

Solution:

The lower esophageal sphincter prevents the backflow of food and acid from the stomach into the esophagus.

Which structure prevents the backflow of food from the stomach into the esophagus?

Which structure prevents the backflow of food from the stomach into the esophagus?

Step 1: Understand that the esophagus is the tube that carries food from the mouth to the stomach.
Step 2: Know that the stomach is where food is mixed with acid and digestive juices.
Step 3: Learn that sometimes food and acid can try to go back up from the stomach into the esophagus.
Step 4: Identify the structure that stops this backflow; it is called the lower esophageal sphincter.
Step 5: Remember that the lower esophageal sphincter is a muscle that opens to let food into the stomach and closes to keep food and acid from coming back up.

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