Final answer:
Acid reflux, known as GERD, leads to stomach acid flowing back into the esophagus causing heartburn. The condition results from improper closing of the lower esophageal sphincter. Digestive structures involved are the esophagus, stomach, and lower esophageal sphincter.
Explanation:
Acid reflux, also known as gastroesophageal reflux disease (GERD), is a condition where stomach acid flows back into the esophagus, leading to symptoms such as heartburn.
GERD is caused by the lower esophageal sphincter not closing properly, allowing stomach contents to reflux into the esophagus, leading to discomfort.
The structures of the digestive system involved in GERD include the esophagus, stomach, and lower esophageal sphincter.
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