Longitudinal Muscle Layer of Stomach

Longitudinal Muscle Layer of Stomach

The structure indicated is the outer longitudinal muscle layer of the stomach.

The stomach walls consists of four parts:

  • Mucosa
  • Submucosa
  • Muscularis externa
  • Serosa

The muscularis externa is the muscular layer of the gastrointestinal wall. In the stomach it consists of three layers:

  • Inner oblique layer
  • Middle circular layer
  • Outer longitudinal layer

Between the middle circular layer and outer longitudinal muscular layer lies Auerbach’s plexus (the myenteric plexus).

Learn more about the digestive system in this tutorial