This document discusses the anatomy of the oral cavity and tongue. It describes the parts of the oral cavity as the vestibule located between the lips and teeth, and the mouth cavity proper which is inner to the teeth. It then outlines the boundaries of the mouth cavity proper including the teeth, palate, tongue, and myelohyoid muscle. The document also examines the external features, muscles, blood supply, lymphatic and nerve drainage of the tongue.

1. Oral (Mouth) Cavity
(Page 102)
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2. Parts of Oral Cavity
1- Vestibule: between lips and teeth.
2- Mouth cavity proper: Inner to teeth.
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3. Vestibule
Mouth cavity
proper
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4. Boundaries of Mouth Cavity
Proper
1- Infront & sides: Teeth
2- Roof: Palate (hard & soft)
3- Floor:
A- Upper surface of anterior 2/3 of tongue.
B- Lower surface of tongue.
C- Below tongue.
D- Myelohyoid muscle and its relations.
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5. Vestibule
Frenulum of tongue
Deep
lingual
vein
Pilca fimberiata
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6. Anterior belly of
digastric m.
Myelohyoid
m.
myelohyoid
nerve
Submental
artery
Beginning of
anterior jugular vein
Superficial
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7. Geniohyoid
m.
Hyoglossus m.
Genio-glossus m.
Stylo-glossus m.
Lingual nerve
Hypoglossal nerve
Deep part of submandibular
gland
Submandibular duct
Myelohyoid m. (cut)
Deep
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8. TONGUE
(Page 106)
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9. External Features
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10. Oral part
Pharyngeal
part
Upper Surface
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11. Sulcus terminalis
Foramen cecum
Lingual
tonsil
Circumvallate
papillae
Filiform papillae
Fungiform papillae
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12. Frenulum of tongue
Deep
lingual
vein
Plica fimberiata
Sublingual fold
Sublingual papilla
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13. Frenulum
of tongue
Sublingual fold
Sublingual papilla receiving opening of submandibular duct
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14. Muscles of the Tongue
Intrinsic
1- Transverse.
2- Vertical
3- Superior
longitudinal.
4- Inferior
longitudinal
Extrinsic
1- Styloglossus
2- Hyoglossus.
3- Genioglossus.
4- Palato-glossus.
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15. A- Extrinsic Muscles
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16. Palato-
glossus m.
Stylo-glossus
m.
Hyo-glossus m.
Genio-glossus m.
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17. B- Intrinsic Muscles
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18. Vertical muscle Transverse muscle
Superior longitudinal m.
Inferior longitudinal m.
Intrinsic muscles
T.S
L.S.
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19. Blood Supply of
Tongue
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20. Arterial Supply
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21. Ext. carotid art.
Lingual art.
Dorsal lingual arteries
Deep artery
of tongue
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22. Venous Drainage
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23. Deep lingual vein
Dorsal lingual veins
Hypoglossal nerve
Common lingual
vein
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24. Lymph Drainage
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25. Submental nodes
Submandibular
nodes
Jugulo-
digastric
nodes
Jugulo-omohyoid
nodes
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26. Submental
nodes
Submandibular
nodes
Jugulo-digastric node
Jugulo-omohyoid node
Post. Belly
of digastric
m.
I.J.V
Omo-hyoid
m.
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27. Nerve Supply
• Motor: Hypoglossal nerve except
palato-glossus muscle.
• Sensory:
Anterior 2/3: lingual & Chorda tympani.
Posterior 1/3: Glossopharyngeal nerve
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