| http://www.w3.org/ns/prov#value | - EsophagusCanal about 10 in long, passes through the center of the diaphragmUpper end is the upper esophageal sphincter, at rest it is closed to prevent air from entering the esophagusLower end is the lower esophageal sphincter, it sits at the gastroesophageal junction, at rest it is closed to prevent reflux of gastric contents, this is where GERD occursFunction- to propel food and fluids and preve
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