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Oral Cavity Proper & Tongue - Coggle Diagram
Oral Cavity Proper & Tongue
Palate (Roof of Oral Cavity)
Osteomuscular wall separating oral cavity from nasal cavity (level of C2 vertebra)
Hard Palate (Anterior Bony 2/3)
Posterior 1/3
Horizontal plate of Palatine bone
Anterior 2/3
Palatine process of Maxilla
Soft Palate / Velum (Posterior 1/3)
Roles:
Swallowing (deglutition)
Sound Modulation
Mobile fibromuscular curtain → Uvula
Oral Floor (Sublingual Base)
Soft tissue base extending between mandibular arch anteriorly and hyoid bone posteriorly
Formed by 3 Paired Muscles:
Mylohyoid
Geniohyoid
Anterior belly of Digastric
Isthmus Of Fauces & Tonsillar Fossa
Posterior gateway communicating between oral cavity proper and oropharynx
Tonsillar Fossae (laterally)
Root of tongue (inferiorly)
Soft palate (superiorly)
Boundaries
Superior
Semilunar fold
Contents
Palatine Tonsil (ovoid lymphoid mass)
Posterior
Palatopharyngeal arch
Anterior
Palatoglossal arch
The Tongue (Lingua / Glossa)
Skeleton & Musculature
Osteofibrous Skeleton
Hyoglossal membrane
Lingual Septum
Hyoid bone
Muscles (8 Paired + 1 Unpaired [Superior Longitudinal])
Intrinsic (Shape)
Superior longitudinal
Inferior longitudinal
Transverse
Vertical
Motor Innervation
CN XII (Hypoglossal) for ALL muscles EXCEPT Palatoglossus (innervated by CN X / Vagus)
Extrinsic (Movement)
Genioglossus
Hyoglossus
Styloglossus
Palatoglossus
External Morphology
Fixed Part
Root (anchored to hyoid bone & mandible)
Free Part
Apex & Body
Dorsum (Superior Surface): Divided by V-shaped Terminal Sulcus (apex = Foramen Cecum):
Anterior 2/3 (Buccal Part)
Median sagittal groove + Lingual Papillae (Filiform, Conical, Fungiform, Circumvallate, Foliate)
Posterior 1/3 (Pharyngeal Part / Root)
Contains Lingual Tonsil; connected to epiglottis by median/lateral glosso-epiglottic folds delimiting the Epiglottic Valleculae
Inferior Surface
Thin mucosa, Lingual Frenulum, fimbriated folds, overlying sublingual veins
Innervation & Blood Supply
Lymphatic Drainage
Apex
Submental lymph nodes
Body
Submandibular & Internal Jugular lymph nodes
Neurovascular Summary
Special Sensory (Taste)
Ant 2/3: Chorda Tympani (CN VII)
Post 1/3: Glossopharyngeal (CN IX)
Sensory (Touch/Pain)
Ant 2/3: Lingual N. (V3)
Post 1/3: CN IX & CN X
Arterial / Venous vessels
Artery: Lingual A. (Deep lingual & Sublingual)
Vein: Lingual V. → IJV