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Final Unit Histology Slides. Oral Epithelium. Buccal surface – stratified squamous non-keratinized epithelium. The Tongue & Gustatory Receptors. Filiform Papillae. Circumvallate Papillae. Gustatory Receptor. Fungiform Papillae. Esophagus. Muscularis. Mucosa. Submucosa. - PowerPoint PPT Presentation
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Filiform Papillae Circumvallate Papillae
Fungiform Papillae
Gustatory Receptor
The Tongue & Gustatory Receptors
Esophagus
Note the thick stratified squamous epithelium of the mucosa as well as the submucosa and muscularis layers.
Muscularis
Submucosa
Mucosa
Stomach
mucosa
lamina propria
muscularis mucosae
gastric pit
Identify the mucosa and its layers, as well as the gastric pits.
Jejunum & Ileum
Main difference is the absence of the submucosal glands or duodenal glands in the jejunum and ileum. Goblet cells are stained blue in this picture, and intestinal crypts are visible as well. These two portions of the small intestine are very similar, so we won’t separate them out histologically. There will be a gradual decrease in the number and size of villi as you progress towards the ileocecal valve, as well as an increase in the quantity of Peyer’s patches.
Ileum – Peyer’s Patches
The large lymphatic nodules are the Peyer’s Patches, notice also the intestinal crypts and villi with increasing numbers of goblet cells.
Pancreas
Pancreas viewed at low magnification, showing both the endocrine (pancreatic islets) and
the exocrine cells.
Pancreatic IsletNote the staining is different, showing the pancreatic islet with darker cells than the
surrounding acini.
Liver
Liver Lobule with central vein in middle, sinusoids visible as white spidery lines going towards the central vein.