Auerbach's plexus (myenteric plexus) in muscularis externa of the small intestine. Compare with slide #27. The muscle layers of the small and large intestine are more regular than those of the stomach which has an extra oblique layer. Plastic embedded section. Neuronal perikarya lack their typical basophilia in this preparation but can be identified based on size and nuclear morphology. This slide also has well preserved smooth muscle.