The esophagus has several variations from the standard plan of the gut tube. These include
A) epithelium of mucosa is stratified squamous.
B) epithelium of mucosa is simple columnar.
C) muscularis externa may be striated muscle.
D) epithelium of mucosa is stratified squamous, and muscularis externa may be striated muscle.
E) epithelium of mucosa is simple columnar, and muscularis externa may be striated muscle.

Question

Quizplus · Accepted Answer

The esophagus has a stratified squamous epithelium in its mucosa and its muscularis externa may have a layer of striated muscle. This combination is the only one that matches two of the options given in the question.

The Esophagus Has Several Variations from the Standard Plan of the Gut