THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -Fortunately, there’s a band of muscle between the stomach and the esophagus-called the Lower Esophageal Sphincter or L-E-S, that clamps down to prevent the stomach contents from moving or refluxing upward and burning the lining of the esophagus.

Detailed explanation-2: -Normal LES function allows food transit from the esophagus into the stomach and prevents the reflux of gastric contents back into the esophagus.

Detailed explanation-3: -The lower esophageal sphincter (LES) is a high-pressure zone located where the esophagus meets the stomach and protects the esophagus from the reflux of gastric contents. The LES is composed of intrinsic and extrinsic components.

Detailed explanation-4: -From there, it descends behind the trachea (windpipe) and the heart. It then passes through the diaphragm, which is a membrane that sits just below the lungs. Just below the diaphragm, at the bottom of the esophagus and top of the stomach, is where you’ll find the LES.