1. General Plan of GIT IC OL A (1) M : Mucosa: Epithelium Lamina Propria Muscularis Mucosa (3) MUSCULOSA IC: Inner circular OL: Outer longitudinal (4) A: Adventitia/ Serosa M S (2) S: Submucosa

2. E E : Non-Keratininzed Stratified Squamous Epithelium on a clear wavy BM.

3. G D Oesophagus Dog G: Oesophageal glands in submucosa: *Mucous Glands *Compound tubulo-alveolar *D: Ducts pierce mucosa to open into lumen G D

4. Oesophagus Cat Well-developed Muscularis Mucosa No Glands in submucosa

5. Digestive Tract Histology Department / Faculty of Medicine / Cairo University

6. Digestive Tract Histology Department / Faculty of Medicine / Cairo University

7. Auerbach´s Plexus between the inner circular ( C) and outer longitudinal (L) muscle layers Arrows:

8. Gastro-oesophageal junction Oesophageal glands Inner oblique submucosa Gastric glands non ker. St . sq.epith.

9. Gastro- Oesophageal Junction

12. 1) Identify the structures Indicated by the arrow. Be specific for the type. 2) In which layer are they present? 2

13. E * Identify (E), Arrows: Black, Blue & Green. Identify astreix. 3

14. Is this slide oesophagus cat or dog? Mention the criteria for differentiation. 4