Oral (Mouth) Cavity(Page 102)

Dr. Sherif Fahmy

Parts of Oral Cavity1- Vestibule: between lips and teeth.2- Mouth cavity proper: Inner to teeth.

Dr. Sherif Fahmy

Vestibule

Mouth cavity proper

Dr. Sherif Fahmy

Boundaries of Mouth Cavity Proper

1- Infront & sides: Teeth2- 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.

Dr. Sherif Fahmy

Vestibule

Frenulum of tongue

Deep lingual vein

Pilca fimberiata

Dr. Sherif Fahmy

Anterior belly of digastric m.

Myelohyoid m.

myelohyoidnerve

Submental artery

Beginning of anterior jugular vein

Superficial

Dr. Sherif Fahmy

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

Dr. Sherif Fahmy

TONGUE(Page 106)

Dr. Sherif Fahmy

External Features

Dr. Sherif Fahmy

Oral part

Pharyngeal part

Upper Surface

Dr. Sherif Fahmy

Sulcus terminalis

Foramen cecumLingual tonsil

Circumvallate papillae

Filiform papillae

Fungiform papillae

Dr. Sherif Fahmy

Frenulum of tongue

Deep lingual vein

Plica fimberiata

Sublingual fold

Sublingual papilla

Dr. Sherif Fahmy

Frenulum of tongue

Sublingual fold

Sublingual papilla receiving opening of submandibular duct

Dr. Sherif Fahmy

Muscles of the TongueIntrinsic1- Transverse.2- Vertical3- Superior longitudinal.4- Inferior longitudinal

Extrinsic1- Styloglossus2- Hyoglossus.3- Genioglossus.4- Palato-glossus.

Dr. Sherif Fahmy

A- Extrinsic Muscles

Dr. Sherif Fahmy

Palato-glossus m.

Stylo-glossus m.

Hyo-glossus m.

Genio-glossus m.

Dr. Sherif Fahmy

B- Intrinsic Muscles

Dr. Sherif Fahmy

Vertical muscle Transverse muscle

Superior longitudinal m.

Inferior longitudinal m.

Intrinsic muscles

T.S

L.S.

Dr. Sherif Fahmy

Blood Supply of Tongue

Dr. Sherif Fahmy

Arterial Supply

Dr. Sherif Fahmy

Ext. carotid art.

Lingual art.

Dorsal lingual arteries

Deep artery of tongue

Dr. Sherif Fahmy

Venous Drainage

Dr. Sherif Fahmy

Deep lingual vein

Dorsal lingual veins

Hypoglossal nerve

Common lingual vein

Dr. Sherif Fahmy

Lymph Drainage

Dr. Sherif Fahmy

Submental nodes

Submandibular nodes

Jugulo-digastric nodes

Jugulo-omohyoid nodes

Dr. Sherif Fahmy

Submental nodes

Submandibular nodes

Jugulo-digastric node

Jugulo-omohyoid node

Post. Belly of digastric m.

I.J.V

Omo-hyoid m.

Dr. Sherif Fahmy

Nerve Supply• Motor: Hypoglossal nerve except

palato-glossus muscle.• Sensory:

Anterior 2/3: lingual & Chorda tympani.Posterior 1/3: Glossopharyngeal nerve

Dr. Sherif Fahmy