<prompt> Myenteric plexus is present inMuscularis externaSubmucosaMucosaSerosa  <response>: The myenteric plexus Auerbach;s plexus, is situated between the outer longitudinal and middle circular muscle layers.The submucous plexus Meissner;s plexus is present between the middle circular layer and mucosa.Collectively these neurons constitute the enteric nervous system.It is also referred to as the LITTLE BRAIN Ref: Ganong;s Review of medical physiology, 23 rd edition, page 448 