GENERAL HISTOLOGY

Detailed explanation-1: -The cardia is the top part of your stomach. It contains the cardiac sphincter, which prevents food from traveling back up your esophagus. The fundus is a rounded section next to the cardia. It’s below your diaphragm (the dome-shaped muscle that helps you breathe).

Detailed explanation-2: -Once you begin swallowing, the process becomes automatic. Your brain signals the muscles of the esophagus and peristalsis begins. Lower esophageal sphincter. When food reaches the end of your esophagus, a ringlike muscle-called the lower esophageal sphincter-relaxes and lets food pass into your stomach.

Detailed explanation-3: -The lower esophageal sphincter at the top of the stomach regulates food passing from the esophagus into the stomach, and prevents the contents of the stomach from reentering the esophagus. The pyloric sphincter at the bottom of the stomach governs the passage of food out of the stomach into the small intestine.