Structure of Stomach and Intestines

Gastric Glands with Chief and Parietal Cells 

Villi with Core of Lamina Propria and Muscle Fibers 

Lining Epithelium Columnar Cells with Striated Borders and Goblet Cells 

Muscularis Externa Inner Circular and Outer Longitudinal Layers 

The next layer is the muscularis externa, which contains circular muscle fibers on the top layers and longitudinal muscle fibers on the outer layers. Finally, the serosa is found which is continuous with the peritoneum. Food movement through the stomach into the intestines occurs by contraction of the muscle fibers in the musclularis. 

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