Topic: Frog: digestive, circulatory, respiratory, nervous and reproductive systems· Structural Organisation in Animals and Plants

Once the undigested and unabsorbed substances enter the caecum, their backflow is prevented by-

1. Pyloric sphincter

2. Sphincter of Oddi

3. Ileo - caecal valve

4. Gastro - oesophageal sphincter

Doubtly Asked 30 Oct 2026 NEET UG 2023 neet Save WhatsApp Report

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Answer: 3. Ileo - caecal valve

Key idea: The valve between the ileum and caecum prevents backflow.

The ileo-caecal valve guards the opening of the ileum into the caecum. The pyloric sphincter guards the stomach exit, the sphincter of Oddi guards the hepatopancreatic duct, and the gastro-oesophageal sphincter guards the stomach entry. Option 3.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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Once the undigested and unabsorbed substances enter the caecum, their backflow is prevented by-

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