1. Anatomy of the Mouth and Esophagus
CH 23
Anatomy of the
Mouth and Esophagus
James F. Thompson, Ph.D.

2. Mouth External Structures Cheeks Lips (labia)
Vestibule – the space between the cheeks and gums
These structures are evolutionary inventions of the mammals which improved food processing.

3. Mouth Oral cavity proper - from teeth and gums to fauces
Palates: hard & soft – separate oral from nasal cavity

4. Teeth
chop and grind food; speech articulators

5. Tongue
A complex versatile (tasty!) skeletal muscle which forms the floor of the oral cavity
Covered with papillae
filiform
fungiform
circumvalate
taste buds
Lingual tonsils
Circumvalate
Fungiform
Filiform

6. Three Pairs of Extrinsic Salivary Glands

7. Pharynx

8. General Histology of GI Tract
Same histological organization from inside to outside and from end to end

9. Esophagus
esophagus
dorsal to trachea

10. Esophagus
Muscular collapsible tube
23-25 cm long

11. Hiatal Hernia

12. Esophageal Reflux Disease
Esophageal Varices 
Esophageal
Adenoma

13. End CH 23 Anatomy of the Mouth and Esophagus