Question

Short internal spines occur in alimentary canal of Periplanata

• A. Oesophagus
• B. Crop
• C. Illeum
• D. Colon

Answer 1

The correct option is C Illeum

Hindgut is divided into ileum, colon, rectum, and anus. The ileum is the first part of the hindgut and has small narrow lumen having an epithelial lining. The ileum leads to a colon, which is broad and slightly coiled.

The inner lining of the colon is thrown into irregular folds and is formed by slender epithelial cells having a chitinous covering. The colon con­tinues into a small sac-like rectum. Illeum is short internal spines which occur in the alimentary canal.

So, the correct answer is 'Illeum'.