Histology of the Alimentary Tract Flashcards
Is this esophagus, stomach, small intestine, or large intestine?
Esophagus
What is this structure? What is this epithelium called?
Esophagus. Squamous non-keratinized epithelium.
Enterochromaffin cells stained with a neurendocrine marker
What are the blue cells in the middle of this picture?
Ganglion cells of the myenteric plexus, sandwiched in between the inner circular muscle layer and the outer longitudinal muscle layer.
Is this esophagus, stomach, small intestine, or large intestine?
Small intestine
What structure is this? What are the folds?
Stomach. Rugae.
What are the pink cells (red arrows)? What do they secrete? What layer are they found in?
Parietal cells
Acid
Lamina Propria
Corpus of the stomach
Gastric Antrum
This is a histological section of the stomach (corpus). Which image is abnormal?
Abnormal on the right - note lymphocytes in the lamina propria.
Chief cells. Pepsinogen.
Gastrin producing neurendocrine cells in the antrum
The blue cells are in between two muscle layers in the esophagus. What are they?
Ganglion cells of the myenteric plexus
This is the gastric antrum. Which side is normal? Which side is abnormal?
Left - normal
Right - carcinoma
What (single-cell layer) is the black arrow pointing to?
Serosal layer of the stomach
Stomach. Note the rugae.
Stomach
What is this? What is on the right and what is on the left?
Transition from the esophagus (right) to cardia of the stomach (left)
Is this esophagus, stomach, small intestine, or large intestine?
Stomach
What is this structure, and what are the little black dots?
Stomach - black dots are gastric pits!
Is this esophagus, stomach, small intestine, or large intestine?
Large intestine
What tissue are we in? What are the blue things?
Esophagus - the blue things are acini.
What is this a picture of? Why are no rugae present?
This is a picture of the stomach taken on endoscopy. The reason you can’t see rugae is that the stomach was inflated with air.
What might this stain be?
Ki67 - stains for proliferating cells
Endoscopic picture of an esophagus
