Question

Order the tunics of the GI tract from superficial (external covering) at the top to deep (lining lumen) on the bottom.

-Instructions
-Submucosa
-Muscularis
-Adventitia or serosa
-Mucosa

Answer 1

The tunics of the GI tract, from superficial to deep, are the Serosa or Adventitia, Muscularis, Submucosa, and Mucosa.

Step-by-step explanation:

The tunics of the GI tract, from superficial to deep, are as follows:

1. Serosa or Adventitia
2. Muscularis
3. Submucosa
4. Mucosa

Starting from the outermost layer, the serosa or adventitia is the superficial layer that consists of connective tissue. Next is the muscularis, which contains both circular and longitudinal muscles. The submucosa lies beneath the muscularis, followed by the mucosa, which is the innermost layer surrounding the lumen.