Question

20. Why is the inner wall of alimentary canal not digested although the digestive enzyme can digest
all the materials that make cells?​

Answer 1

Answer:

because the wall of stomach and alimentary canal is having a cover of MUCUS which provides protection

Answer 2

Answer:

because a part from all the enzymes like hcl, pepsin there is another type of enzyme called mucus which form lining towards the wall of elementary canal to protect from hcl.