Question

Which option is correct for the region labelled as A and B in the given diagram of transverse section of gut?

• A. A-Mucosa B-Submucosa
• B. A-Nerve B-Circulatory muscle
• C. A-Villi B-Mucosal gland
• D. A-Longitudinal muscle B-Muscularis mucosa

Answer 1

Answer: (A)

The transverse section of the human alimentary canal consists of 4 distinct layers. 1. the innermost mucosa, 2. submuosa on top of the mucosal layer, 3. Muscularis- a layer of smooth muscles covering the submucosal layer. 4. serosa- the outermost layer of the alimentary canal.

In the figure, the A - represents the innermost layer mucosa and B the layer on top of mucosa called the submucosa. Thus, the correct option is A.