Final Unit Histology Slides

Oral Epithelium Buccal surface – stratified squamous non-keratinized epithelium

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.

Duodenum

Microvilli SEM Microvilli TEM

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.

Colon Section of the large intestine, notice the high concentration of goblet cells.

Salivary Glands Parotid Gland Sublingual Gland Submandibular Gland

Pancreas Pancreas viewed at low magnification, showing both the endocrine (pancreatic islets) and the exocrine cells. Pancreatic Islet Note 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.

Galbladder

Ovary with Follicles

Ovary showing Corpus Luteum

Uterus endometrium myometrium perimetrium

Testis & Epididymis

Penis corpora cavernosae corpora spongiosum spongy (penile) urethra