Stomach - The Digestive System

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Stomach

C-Shaped organ located on the upper left side of the abdominal cavity

Cardiac Sphincter

What appropriates the stomach and the esophagus

Pyloric Sphincter

What separates the stomach and the small intestine

Sphincters

Valves that prevent food from going backwards through the alimentary canal

Rugae

Folds that line the stomach, allows the stomach to expand when filled with food

What is the inner layer of the stomach

Mucosal layer

Gastric Juice

Secreted acids and enzymes (secreted by specialized cells)

Chief Cells

Produce pepsinogen

Parietal Cells

Produce hydrochloric acid

Neck cells

Produce mucous

Stomach Function

Storage tank for food (some nutrients are absorbed in the stomach)

What happens as food enters the stomach

Peristaltic contractions mix food with gastric juice

What does gastric juice contain

HCI and pepsinogen, HCI kills bacteria and activates pepsinogen

Chyme

The liquid food becomes once it is completely mixed (food won’t leave the stomach unless it’s completely liquified)