If one examined the various layers of the gastrointestinal tract of a vertebrate,they would encounter (going from outside the tract to inside of the tract)
A)the submucosa,the mucosa,the lumen,the plexuses,and the serosA.
B)the serosa,submucosa,and the mucosa.
C)the serosa,submucosa,and the lumen.
D)the mucosa,the plexuses,and the serosa.
E)the serosa,the mucosa,and the submucosa.

Question

Quizplus · Accepted Answer

The gastrointestinal tract of a vertebrate consists of three main layers: the outermost layer called the serosa, the middle layer called the submucosa, and the innermost layer called the mucosa. Therefore, the correct order is serosa, submucosa, and mucosa, making choice B the best answer. The lumen and plexuses are components that are present within these layers.

If One Examined the Various Layers of the Gastrointestinal Tract