Asked by poojathally | 4th Jan, 2010, 06:04: PM

Expert Answer:

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.

Answered by  | 5th Jan, 2010, 10:34: AM

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