QUESTION 23 The mucosa is the innermost layer and lines the lumen of the digestive tract. What is the mucosa of the stomach, small intestine, and most of the large intestine made of? O simple columnar epithelium and lamina propria Osimple columnar epithelium and muscularis mucosa Olamina propria and muscularis mucosa O simple columnar epithelium and muscularis externa Osimple columnar epithelium, lamina propria, and muscularis mucosa Osimple columnar epithelium, lamina propria, and muscularis externa

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