The correct sequence of layers in the wall of the alimentary canal, from internal to external, is
A) mucosa, muscularis, serosa, submucosa.
B) mucosa, submucosa, muscularis, serosa.
C) serosa, muscularis, mucosa, submucosa.
D) submucosa, mucosa, serosa, muscularis.

Question

Quizplus · Accepted Answer

The alimentary canal wall is composed of four layers, starting from the inside and moving outwards: mucosa, submucosa, muscularis, and serosa. Therefore, the correct sequence is mucosa, submucosa, muscularis, serosa, which is only represented in option B.

The Correct Sequence of Layers in the Wall of the Alimentary