Digestive System Multiple Choice Flashcards | Quizlet Digestive System Multiple Choice. During deglutition, the bolus passes into the stomach from the esophagus through the: ileocecal valve. urethral sphincter. gastroesophageal sphincter. pyloric sphincter. esophageal sphincter. Reviewing Facts & Terms: Multiple Choice From the outside in, the correct order of the layers of the digestive tract is serosa, muscularis externa, submucosa, mucosa. muscularis externa, serosa, submucosa, mucosa.
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