stomach muscle diagram

August 03, 2026

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Your stomach sits in your upper abdomen on the left side of your body. The top of your stomach connects to a valve called the esophageal sphincter (a muscle at the end of your esophagus). Learn stomach anatomy with a labeled diagram, parts of stomach, four regions, wall layers & functions to understand how digestion works. Muscle contractions and stomach acid break down food to absorb nutrients. Indigestion, GERD, and ulcers commonly affect the stomach. Eating slowly and staying hydrated can help keep your... Your abdominal muscles surround your trunk between the rib cage and pelvis and keep your abdominal organs safe. Your core abdominal muscles also support your trunk and allow movements while keeping ... In the human digestive system, the stomach lies between the esophagus and the duodenum (the first part of the small intestine). It is in the left upper quadrant of the abdominal cavity. The top of the stomach lies against the diaphragm. Lying behind the stomach is the pancreas. For related background details, please refer to our report on wiring fan with light switch. Stomach, saclike expansion of the digestive system, between the esophagus and the small intestine; it is located in the anterior portion of the abdominal cavity in most vertebrates. The stomach plays a vital role in digestion, serving as a reservoir for food, breaking it down mechanically and chemically, and regulating its passage into the small intestine. The stomach is located in the upper abdomen, primarily occupying the epigastric and left hypochondriac regions. Its size, shape and position can vary between individuals and change with respiration and body position.