GENERAL HISTOLOGY

Detailed explanation-1: -Food and liquids pass through the cardia to enter the stomach from the esophagus. A valve near the cardia helps keep stomach contents from backing up into the esophagus. The stomach is an organ in the upper abdomen.

Detailed explanation-2: -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. This sphincter usually stays closed to keep what’s in your stomach from flowing back into your esophagus.

Detailed explanation-3: -The esophagus (oesophagus) is a 25 cm long fibromuscular tube extending from the pharynx (C6 level) to the stomach (T11 level). It consists of muscles that run both longitudinally and circularly, entering into the abdominal cavity via the right crus of the diaphragm at the level of the tenth thoracic vertebrae.

Detailed explanation-4: -The cardia is the first part of the stomach, which is connected to the esophagus. It contains the cardiac sphincter, which is a thin ring of muscle that helps to prevent stomach contents from going back up into the esophagus.

Detailed explanation-5: -The word comes from the Greek kardia meaning heart, the cardiac orifice of the stomach.