Human Digestive System · NCERT Biology

Which layer of the alimentary canal contains nerves, blood vessels, and lymph vessels?

  1. Outer serosa
  2. Sub-mucosa
  3. Muscularis externa
  4. Mucosa
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Correct answer: Sub-mucosa

The sub-mucosa is a layer of loose connective tissue that supports the mucosa. It contains larger blood vessels, lymphatics, and nerve plexuses such as Meissner's plexus.

Difficulty: Medium Question 18 of 20

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