Explain the layers of the alimentary canal wall shown in the image in simple short points

The alimentary canal wall has four main layers: mucosa, submucosa, muscularis externa, and serosa.

Alimentary Canal Wall:

Lumen – central hollow space where food passes

Mucosa – inner lining

Muscularis mucosa – thin muscle layer under mucosa

Submucosa – support layer with vessels and nerves

Submucosal plexus – nerve network in submucosa

Circular muscle layer – muscle layer for squeezing movement

Myenteric plexus – nerve network between muscle layers

Longitudinal muscle layer – muscle layer for shortening movement

Serosa – outer protective layer

Mesentery – tissue that supports and attaches the intestine