PSL301H1 Lecture Notes - Lecture 28: Lamina Propria, Paneth Cell, Goblet Cell
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PSL301H1 Full Course Notes
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Document Summary
Overall function & structure of the digestive system. Anatomy: tubular gi tract, mouth pharynx esophagus stomach small & large intestine. Mechanically breaks down food and mix it with secretions (3 muscle layers - length, circular and diagonal contractions) Epithelial cells (enterocytes) several types; mainly secretes bicarbonate, and absorbs nutrients, water and vitamins. Enteroendocrine cells several types; secretes hormones into the bloodstream. Exocrine cells: goblet cells secrete mucus, paneth cells secrete antimicrobial compounds. Stem cells found at the bottom of crypts; becomes mucosal cells. 4 layers: mucosa (inner layer) mucus epithelium & lamina propria (vili, submucosa, muscularis externa circular layer and longitudinal layer of muscle (allows for the villi to. Wave to sirr contents: serosa fluid-like secretions to allow small intestines to move against each other. Peyer"s patches collection of immune cells in the lamina propria, looking for any pathogens that might have entered. M (microfold) cells transports antigens from the lumen to the immune cells (in the.
