Which plexus lies between the external longitudinal and circular muscle layers?

Which plexus lies between the external longitudinal and circular muscle layers?

• A. Meissner's plexus
• B. Myenteric plexus
• C. Submucosal plexus
• D. Auerbach's plexus

Answer: (B)

The myenteric plexus lies between the outer longitudinal and inner circular muscle layers of the muscularis externa. It’s the nerve network that coordinates gut motility by regulating the tone and contraction of these two muscle layers along the length of the GI tract. In contrast, Meissner’s (submucosal) plexus sits in the submucosa and mainly influences secretions and local blood flow, not the between-muscle-layer region. So the network between those two muscle layers is the myenteric plexus.

The myenteric plexus lies between the outer longitudinal and inner circular muscle layers of the muscularis externa. It’s the nerve network that coordinates gut motility by regulating the tone and contraction of these two muscle layers along the length of the GI tract. In contrast, Meissner’s (submucosal) plexus sits in the submucosa and mainly influences secretions and local blood flow, not the between-muscle-layer region. So the network between those two muscle layers is the myenteric plexus.