Q:

The wall of the alimentary canal is made up of the four layers (not in any order): the muscularis externa, serosa, mucosa and sub-mucosa. Which layer absorbs the end products of digestion

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The wall of the alimentary canal is made up of the four layers (not in any order): the muscularis externa, serosa, mucosa and sub-mucosa. Which layer absorbs the end products of digestion?


  1. sub-mucosa
  2. muscularis externa
  3. serosa
  4. mucosa

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 D: The mucosa is the innermost layer so digested food must pass through it to be absorbed.

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