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Stomach and Spleen

side view

This is a view of the abdomen from the pig's left side (rostral to the top and caudal to the bottom), with the stomach cut open.

Pyloric Sphincter

With the stomach opened, the pyloric sphincter (the ring-like involuntary muscle that controls the movement of chyme from the stomach into the small intestine) is visible.


Inside the stomach are rugae, ridges that increase the surface area of the stomach and stretch out to increase stomach volume when the stomach is full.


The spleen is found along the left external margin of the stomach. It is an immune system organ that fights infection and also breaks down expired red blood cells.


Next: Rectum, umbilical arteries, pancreas

Back to: Digestive system

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