1.

State reason for the following The inner wall of the alimentary canal is not digested

Answer» Mucus is a liquidy substance which helps in digestion ,and even helps in protecting the inner lining of the stomach from HCL
The mucus is a substance secreted along the tube by cells lining its walls .Mucus helps food to slide through the canal without doing too much damage to the lining. It also forms a protective covering which keeps the digestive juices, which are inside the lumen of the canal, from coming into contact with the living cells of the walls. So the inner wall of alimentary canal is not digested.
Mucus protect alimentary canal
The mucus is a substance secreted along the tube by cells linning it\'s walls mucus help is food slides to through the canal
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