1. Neeraj Kumar
  2. Science 10
  3. Thursday, June 16 2016, 08:43 PM
Why is the inner wall of alimentary canal not digested although the digestive enzyme can digest all the materials that make cells?
Ritik Raj Accepted Answer Pending Moderation
The inner wall of alimentary canal is not digested because it has the following protective mechanisms:

(i)The gastric mucin seceted by the gastric mucosa acts as buffer, which reduces high gastric acidity ans prevents injury to the inner wall of the alimentary canal.

(ii) The enzymes are secreted only when food is presnt in the alimentary canal and they are in an inactive form.
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