1. GI Sequence - Histology Pharynx, Esophagus and Stomach January 6, 2010

2. #152 Pharynx H&E

3. #152 Pharynx – Elastic fibers 152triC (aldehyde fuchsin)152 H&E

4. #126 H&E Mid-esophagus

5. #126 Esophagus – muscularis mucosae

6. #126 mid-esophagus #152 triC Pharynx Epithelium Lamina propria Elastic fibers Skeletal muscle Epithelium Lamina propria Elastic fibers Skeletal muscle Epithelium Lamina propria Muscularis mucosae Sumucosal glands Smooth and skeletal m. Epithelium Lamina propria Muscularis mucosae Sumucosal glands Smooth and skeletal m. trachea esophagus

7. Muscularis Externa of mid-esophagus (#126): Skeletal and smooth m. Muscularis Externa of lower esophagus (#155): Smooth muscle only

8. #155 : Cardiac Stomach Cardio-esophageal junction (arrow) Cardiac glands

9. #160 (PAS) Esophagus – Stomach darker staining gastric pits and lighter staining glands (cardiac and fundic) esophagus Cardiafundus

10. #156: Fundic Stomach Rugae

11. Mucosa of the Fundic Stomach Lymphatic nodule Muscularis mucosae

12. #156, #157: Gastric glands Gastric pit lined by surface mucous cells Mucous neck cells Fundus or body

13. #157: Body of the gastric glands

14. #157: Base of the gastric glands Chief cells Parietal cells

15. #162 Pylolic Stomach Pylo-duodenal junction (arrow) Pyloric sphincter muscle

16. Cardiac glands: coiled (mucous) glands pit:gland=1:1 Fundic (gastric) glands: straight glands pit:gland=1:5 Pyloric glands: coiled (mucous) glands pit:gland=2~3:1