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
Subtopic:  Introduction to Digestive System | Movement of Food in Gut |  DIGESTION OF FOOD |
 76%
From NCERT
NEET - 2023
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