From the esophagus to the anal canal,the walls of every organ of the alimentary canal are made up of the same four basic layers.Arrange them in order from the lumen.
A) serosa, mucosa, submucosa, and muscularis externa
B) mucosa, submucosa, muscularis externa, and serosa
C) submucosa, serosa, muscularis externa, and mucosa
D) muscularis externa, serosa, mucosa, and submucosa

Question

Quizplus · Accepted Answer

The mucosa, which is in direct contact with the lumen, is followed by the submucosa, then the muscularis externa, and finally the serosa on the outermost layer. This is the order in which they are arranged along the length of the alimentary canal.

From the Esophagus to the Anal Canal,the Walls of Every