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)muscularis externa,serosa,mucosa,and submucosa
B)submucosa,serosa,muscularis externa,and mucosa
C)serosa,mucosa,submucosa,and muscularis externa
D)mucosa,submucosa,muscularis externa,and serosa

Question

Quizplus · Accepted Answer

The mucosa is the innermost layer, followed by the submucosa, muscularis externa, and finally the serosa on the outermost layer. This order ensures that the food passes through the appropriate layers for digestion and absorption, and is protected by the outer layer. The correct order is mucosa, submucosa, muscularis externa, and serosa. Therefore, (D) is the correct choice.

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