Oral Vestibule | Oral Cavity Proper | Tongue | Muscles

1. ORAL CAVITY
Oral Vestibule | Oral Cavity Proper | Tongue |
Muscles
Faryal Saeed Abdal

2. Oral Cavity | Basics
Oral cavity is situated anteriorly on the
face, under the nasal cavities.
It is bounded by a roof, a floor and
lateral walls.
Anteriorly it opens to the face through
the oral fissure, while posteriorly the
oral cavity communicates with the
oropharynx.

3. Oral Cavity | Basics
A number of bones contribute to the
framework of the oral cavity; which are
• maxillae
• palatine
• temporal
• mandible
• sphenoid
• hyoid

4. Oral Cavity | Responsibility
It houses the structures necessary for
• mastication
• speech
which include the teeth, the tongue and
associated structures (such as the
salivary glands)

5. Oral Cavity | Parts
Oral Vestibule: anterior part, area
between teeth and lips
Oral Cavity Proper: posterior
area, behind/inside the teeth
Inside of the oral cavity is constantly lubricated by salivary glands
which also participate in food digestion by secreting enzymes that
start the digestion of carbohydrates. These glands are the parotid,
submandibular & sublingual glands.

6. Oral Cavity | Parts

7. Oral Cavity | Tongue
Tongue is the central part
of the oral cavity.
It’s a muscular organ
whose base is attached to
the floor of the oral cavity,
whilst its apex is free and
mobile.

8. Oral Cavity | Tongue
Most of the oral cavity functions are
related to
tongue
especially the tongue’s muscular and
sensory abilities.

9. Oral Cavity | Key Fcats
Definition The first part of the digestive system that contains the structures
necessary for mastication and speech; teeth, tongue and salivary glands.
Tongue A muscular organ in the oral cavity that enables taste sensation, chewing,
swallowing and speaking.
Muscles of the
tongue
Intrinsic: muscles that make up the inside of the tongue
Superior longitudinal, inferior longitudinal, transverse and vertical muscles
Extrinsic: muslces that are located outside the tongue and only attach to it in
in specific regions
Genioglossus, hyoglossus, styloglossus and palatoglossus muscles
Innervation of
the tongue
Motor: All muscles are innervated by hypoglossal nerve (CN XII), except for
for palatoglossus which is supplied by vagus nerve (CN X).
Sensory:
- General and taste sensation from the posterior third: glossopharyngeal nerve
(CN IX);
- General sensation from the anterior two-thirds: lingual nerve (branch of the
mandibular nerve - V3);
- Taste sensation from the anterior two-thirds: facial nerve (CN VII)

10. Author
Faryal Saeed Abdal
MD (Dentistry) | BA (Mass Comm)
Chief Dental Technologist | Dental College & Hospital Adminsitrator
Niazi Medical & Dental College, Sargodha
+92 312 4027663 | faryalsaeed@gmail.com | youtube.com/faryalsaeed
This lecture was prepared from https://www.kenhub.com/en/library/anatomy/the-oral-cavity