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Overview: Muscularis externa

Muscularis externa of the stomach has inner oblique (an inconsistent layer), middle circular, and outer longitudinal layers; only the latter two layers are seen here.  The myenteric (Auerbach’s) plexus, located between circular and longitudinal muscle layers, provides fibers from the autonomic nervous system to muscularis externa.  A serosa is the outermost tunic.  Trichrome stain, 100x, 800x

Mucosa <p>Muscularis externa of the stomach has inner oblique (an inconsistent layer), middle circular, and outer longitudinal layers; only the latter two layers are seen here.  The myenteric (Auerbach’s) plexus, located between circular and longitudinal muscle layers, provides fibers from the autonomic nervous system to muscularis externa.  A serosa is the outermost tunic.  Trichrome stain, 100x, 800x</p>

Mucosa

Muscularis externa of the stomach has inner oblique (an inconsistent layer), middle circular, and outer longitudinal layers; only the latter two layers are seen here.  The myenteric (Auerbach’s) plexus, located between circular and longitudinal muscle layers, provides fibers from the autonomic nervous system to muscularis externa.  A serosa is the outermost tunic.  Trichrome stain, 100x, 800x
Submucosa <p>Muscularis externa of the stomach has inner oblique (an inconsistent layer), middle circular, and outer longitudinal layers; only the latter two layers are seen here.  The myenteric (Auerbach’s) plexus, located between circular and longitudinal muscle layers, provides fibers from the autonomic nervous system to muscularis externa.  A serosa is the outermost tunic.  Trichrome stain, 100x, 800x</p>

Submucosa

Muscularis externa of the stomach has inner oblique (an inconsistent layer), middle circular, and outer longitudinal layers; only the latter two layers are seen here.  The myenteric (Auerbach’s) plexus, located between circular and longitudinal muscle layers, provides fibers from the autonomic nervous system to muscularis externa.  A serosa is the outermost tunic.  Trichrome stain, 100x, 800x
Muscularis externa <p>Muscularis externa of the stomach has inner oblique (an inconsistent layer), middle circular, and outer longitudinal layers; only the latter two layers are seen here.  The myenteric (Auerbach’s) plexus, located between circular and longitudinal muscle layers, provides fibers from the autonomic nervous system to muscularis externa.  A serosa is the outermost tunic.  Trichrome stain, 100x, 800x</p>

Muscularis externa

Muscularis externa of the stomach has inner oblique (an inconsistent layer), middle circular, and outer longitudinal layers; only the latter two layers are seen here.  The myenteric (Auerbach’s) plexus, located between circular and longitudinal muscle layers, provides fibers from the autonomic nervous system to muscularis externa.  A serosa is the outermost tunic.  Trichrome stain, 100x, 800x
- Middle circular layer <p>Muscularis externa of the stomach has inner oblique (an inconsistent layer), middle circular, and outer longitudinal layers; only the latter two layers are seen here.  The myenteric (Auerbach’s) plexus, located between circular and longitudinal muscle layers, provides fibers from the autonomic nervous system to muscularis externa.  A serosa is the outermost tunic.  Trichrome stain, 100x, 800x</p>

- Middle circular layer

Muscularis externa of the stomach has inner oblique (an inconsistent layer), middle circular, and outer longitudinal layers; only the latter two layers are seen here.  The myenteric (Auerbach’s) plexus, located between circular and longitudinal muscle layers, provides fibers from the autonomic nervous system to muscularis externa.  A serosa is the outermost tunic.  Trichrome stain, 100x, 800x
- Outer longitudinal layer <p>Muscularis externa of the stomach has inner oblique (an inconsistent layer), middle circular, and outer longitudinal layers; only the latter two layers are seen here.  The myenteric (Auerbach’s) plexus, located between circular and longitudinal muscle layers, provides fibers from the autonomic nervous system to muscularis externa.  A serosa is the outermost tunic.  Trichrome stain, 100x, 800x</p>

- Outer longitudinal layer

Muscularis externa of the stomach has inner oblique (an inconsistent layer), middle circular, and outer longitudinal layers; only the latter two layers are seen here.  The myenteric (Auerbach’s) plexus, located between circular and longitudinal muscle layers, provides fibers from the autonomic nervous system to muscularis externa.  A serosa is the outermost tunic.  Trichrome stain, 100x, 800x
- Myenteric (Auerbach's) plexus <p>Muscularis externa of the stomach has inner oblique (an inconsistent layer), middle circular, and outer longitudinal layers; only the latter two layers are seen here.  The myenteric (Auerbach’s) plexus, located between circular and longitudinal muscle layers, provides fibers from the autonomic nervous system to muscularis externa.  A serosa is the outermost tunic.  Trichrome stain, 100x, 800x</p>

- Myenteric (Auerbach's) plexus

Muscularis externa of the stomach has inner oblique (an inconsistent layer), middle circular, and outer longitudinal layers; only the latter two layers are seen here.  The myenteric (Auerbach’s) plexus, located between circular and longitudinal muscle layers, provides fibers from the autonomic nervous system to muscularis externa.  A serosa is the outermost tunic.  Trichrome stain, 100x, 800x
- Neuron cell bodies <p>Muscularis externa of the stomach has inner oblique (an inconsistent layer), middle circular, and outer longitudinal layers; only the latter two layers are seen here.  The myenteric (Auerbach’s) plexus, located between circular and longitudinal muscle layers, provides fibers from the autonomic nervous system to muscularis externa.  A serosa is the outermost tunic.  Trichrome stain, 100x, 800x</p>

- Neuron cell bodies

Muscularis externa of the stomach has inner oblique (an inconsistent layer), middle circular, and outer longitudinal layers; only the latter two layers are seen here.  The myenteric (Auerbach’s) plexus, located between circular and longitudinal muscle layers, provides fibers from the autonomic nervous system to muscularis externa.  A serosa is the outermost tunic.  Trichrome stain, 100x, 800x
- Peripheral nerves <p>Muscularis externa of the stomach has inner oblique (an inconsistent layer), middle circular, and outer longitudinal layers; only the latter two layers are seen here.  The myenteric (Auerbach’s) plexus, located between circular and longitudinal muscle layers, provides fibers from the autonomic nervous system to muscularis externa.  A serosa is the outermost tunic.  Trichrome stain, 100x, 800x</p>

- Peripheral nerves

Muscularis externa of the stomach has inner oblique (an inconsistent layer), middle circular, and outer longitudinal layers; only the latter two layers are seen here.  The myenteric (Auerbach’s) plexus, located between circular and longitudinal muscle layers, provides fibers from the autonomic nervous system to muscularis externa.  A serosa is the outermost tunic.  Trichrome stain, 100x, 800x
Serosa <p>Muscularis externa of the stomach has inner oblique (an inconsistent layer), middle circular, and outer longitudinal layers; only the latter two layers are seen here.  The myenteric (Auerbach’s) plexus, located between circular and longitudinal muscle layers, provides fibers from the autonomic nervous system to muscularis externa.  A serosa is the outermost tunic.  Trichrome stain, 100x, 800x</p>

Serosa

Muscularis externa of the stomach has inner oblique (an inconsistent layer), middle circular, and outer longitudinal layers; only the latter two layers are seen here.  The myenteric (Auerbach’s) plexus, located between circular and longitudinal muscle layers, provides fibers from the autonomic nervous system to muscularis externa.  A serosa is the outermost tunic.  Trichrome stain, 100x, 800x
- Mesothelium <p>Muscularis externa of the stomach has inner oblique (an inconsistent layer), middle circular, and outer longitudinal layers; only the latter two layers are seen here.  The myenteric (Auerbach’s) plexus, located between circular and longitudinal muscle layers, provides fibers from the autonomic nervous system to muscularis externa.  A serosa is the outermost tunic.  Trichrome stain, 100x, 800x</p>

- Mesothelium

Muscularis externa of the stomach has inner oblique (an inconsistent layer), middle circular, and outer longitudinal layers; only the latter two layers are seen here.  The myenteric (Auerbach’s) plexus, located between circular and longitudinal muscle layers, provides fibers from the autonomic nervous system to muscularis externa.  A serosa is the outermost tunic.  Trichrome stain, 100x, 800x
Area shown in next image <p>Muscularis externa of the stomach has inner oblique (an inconsistent layer), middle circular, and outer longitudinal layers; only the latter two layers are seen here.  The myenteric (Auerbach’s) plexus, located between circular and longitudinal muscle layers, provides fibers from the autonomic nervous system to muscularis externa.  A serosa is the outermost tunic.  Trichrome stain, 100x, 800x</p>

Area shown in next image

Muscularis externa of the stomach has inner oblique (an inconsistent layer), middle circular, and outer longitudinal layers; only the latter two layers are seen here.  The myenteric (Auerbach’s) plexus, located between circular and longitudinal muscle layers, provides fibers from the autonomic nervous system to muscularis externa.  A serosa is the outermost tunic.  Trichrome stain, 100x, 800x
Main SlideMucosaSubmucosaMuscularis externa - Middle circular layer - Outer longitudinal layer - Myenteric (Auerbach's) plexus - Neuron cell bodies - Peripheral nervesSerosa - MesotheliumArea shown in next image