The inner wall of the alimentary canal is not digested by the digestive enzymes because it is composed of different types of tissues that are resistant to the action of these enzymes. The digestive enzymes are designed to break down specific macromolecules like proteins, carbohydrates, and lipids, but they cannot break down the structural components of tissues.

Composition of Alimentary Canal Wall

The inner wall of the alimentary canal is composed of several layers of tissues, including:

1. Mucosa: This layer lines the lumen of the canal and is composed of epithelial cells, mucus-secreting cells, and a thin layer of connective tissue.

2. Submucosa: This layer consists of connective tissue, blood vessels, and nerves.

3. Muscularis: This layer is composed of smooth muscle tissue that helps move food through the canal.

4. Serosa: This is the outermost layer of the alimentary canal and is composed of connective tissue and a layer of epithelial cells.

Resistance of Tissues to Digestive Enzymes

The tissues that make up the inner wall of the alimentary canal are resistant to the action of digestive enzymes for several reasons:

1. Structural complexity: The tissues of the alimentary canal are highly structured and contain a variety of different types of molecules, including proteins, lipids, and carbohydrates, that are tightly packed together. Digestive enzymes are not able to break down these complex structures.

2. Protective secretions: The mucosa layer of the alimentary canal secretes mucus, which provides a protective barrier against the digestive enzymes. This prevents the enzymes from coming into direct contact with the tissues.

3. Enzyme inhibitors: The tissues of the alimentary canal also produce enzyme inhibitors that prevent the digestive enzymes from breaking down the tissues.

Conclusion

In conclusion, the inner wall of the alimentary canal is not digested by the digestive enzymes because it is composed of complex tissues that are resistant to the action of these enzymes. The tissues contain a variety of different types of molecules that are tightly packed together, and they also secrete protective secretions and enzyme inhibitors that prevent the enzymes from breaking them down.

Hey see ---!!!

it is right that the digestive enzymes can digest all the materials but not digest "inner wall of alimentary canal" it is because the inner wall of alimentary canal are protected by a layer called mucus which is understandable so it prevents the inner wall

hope you got it

thanx