Introduction to Digestive System Past Year (2019 onward - NTA Papers) MCQs Digestion and Absorption (OLD NCERT) Zoology NEET Practice Questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, and PDF solved with answers

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 |

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