Muscularis

• Most sections of the GI tract contain two layers in the muscularis


  inner circular layer of muscularis, and outer longitudinal layer of muscularis
• Stomach contains additional

  oblique layer of muscularis for a total of three layers
• Contractions of muscularis propel


  food forward and mix and churn ingested food
• Muscularis at ends of tract is made of


  skeletal muscle - gives voluntary control of swallowing and defecation
• Myenteric nerve plexus (auerbach)


  responsible for motility