immediately before passing into the large intestine, the food mass must pass though the ileocecal valve pyloric sphincter bolus lower esophageal sphincter pancreas

​immediately before passing into the large intestine, the food mass must pass though the ileocecal valve.
This muscle valve is part of the gastrointestinal system and separates the small intestine and the large intestine. The valve opens when a bolus of food passes from the small intestine into the large intestine (your inner sewer pipe) during peristalsis.

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