Stomach Anatomy Located on left side of the abdominal cavity Food enters at cardioesophageal sphincter Slide 14.15a Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

Stomach Anatomy Regions of the stomach Cardiac region – near the heart Fundus Body Pylorus – funnel-shaped terminal end Food empties into the small intestine at the pyloric sphincter Slide 14.15b Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

Stomach Anatomy Rugae – internal folds of the mucosa External regions Lesser curvature Greater curvature Slide 14.16a Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

Stomach Anatomy Layers of peritoneum attached to the stomach Lesser omentum – attaches the liver to the lesser curvature Greater omentum – attaches the greater curvature to the posterior body wall Contains fat to insulate, cushion, and protect abdominal organs Slide 14.16b Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

Stomach Anatomy Figure 14.4a Slide 14.17 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

Stomach Functions Acts as a storage tank for food Site of food breakdown Chemical breakdown of protein begins Delivers chyme (processed food) to the small intestine Slide 14.18 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

Specialized Mucosa of the Stomach Mucous neck cells – sticky alkaline mucus Gastric glands – gastric juice Chief cells – protein-digesting enzymes (pepsinogens) Parietal cells – hydrochloric acid Endocrine cells –gastrin Slide 14.19 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

Structure of the Stomach Mucosa Gastric pits formed by folded mucosa Glands and specialized cells are in the gastric gland region Slide 14.20a Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

Structure of the Stomach Mucosa Figure 14.4b, c Slide 14.20b Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings