Multiple choice

The lining wall of the alimentary canal appears different in different parts of the gut, reflecting different roles, but always has the same basic layers. Which among the following layers prevents food from traveling backward?

  1. The muscularis externa

  2. The gastric mucosa

  3. The submucosa

  4. The serosa

  5. The oral mucosa

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The muscularis externa consists of an inner circular layer and a longitudinal outer muscular layer.