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small intestines (small intestinal vili (ciliated simple columnar…
small intestines
small intestinal vili
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lacteal: lymphatic vessel of the small intestine, also absorb digested fat b/c its too big for capillaries
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duodenum (mixing bowl)
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primary functions
neutralize: the acid from the stomach before it can damage the absorptive surfaces of the small intestines
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absorptive sections
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cells
goblet cells: basal nuceli, make mucus
microfold cells (M cells): located in the mucosal layer over Peyer's patches in the ileum, they endocytose antigens and transport them to underlying immune cells
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paneth cells: located in the basal portion of intestinal crypts, very eosinophilic, produce lysozyme
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