Beginning at the lumen, the sequence of layers of the digestive tract wall is
A) submucosa, mucosa, serous membrane, muscularis.
B) muscularis, lamina propria, submucosa, mucosa.
C) mucosa, submucosa, muscularis, serosa.
D) peritoneum, submucosa, mucosa, lamina propria.
E) submucosa, mucosa, adventitia, muscularis.

Question

Quizplus · Accepted Answer

The correct sequence of layers of the digestive tract wall from the lumen outward is mucosa, submucosa, muscularis, and serosa. This order reflects the general structure found in most parts of the digestive system, providing functions from absorption and secretion to muscle contraction and protective covering.

Beginning at the Lumen, the Sequence of Layers of the Digestive