2. These are two fleshy folds that circumscribe the mouth
and closes the cavity. At the sides they unite to form the oral
commisures
5 LAYERS
1. Skin – contains hair follicles and sebaceous glands
2. Superficial Fascia- contains some fats
3. Orbicularis Oris muscle – serves as sphincter of the mouth
4. Submucous tissue – contains vessels, mucous labial glands
and labial branches of facial artery
5. Mucous membrane – innermost layer

3. Oral Cavity Oral Vestibule
Proper

4. Boundaries:
1. Anteriorly by lips
2. Laterally by cheeks
3. Posteriorly and
medially by teeth and
gums

5. Boundaries:
1. Anteriorly laterally
by teeth and gums
2. Superiorly by the
palate
3. Inferiorly by the
tongue and the
floor of the mouth
4. Posteriorly by
opening into the
pharynx

6. Lingual frenulum
(connects the
tongue to the floor
of the mouth)
Sublingual fold
(passes lateraly and
backwards from the
papilla and overlies
the sublingual
Papillae ( openings gland)
of submandibular
duct)
Each sublingual compartment contains submandibular
gland and dcuts, lingual and hypoglossal nerve and the
siblingul vessels.

7.  Smallest salivary gland
 Indicated by the sublingual
fold, found between the
alveolus and anteiror part of
the tongue
 Lesser sublingual duct
(Rivini’s ducts) – opens into
the floor of the mouth
 Greater sublingual duct
(Bartholin’s ducts) opens on
the sublingual caruncle

8.  Located at the
submandibular fossa below
mylohyoid muscle.
 Submandibular duct
(Wharton’s ducts) – opens at
the sublingual papillae

9.  Consists of dense vascular fibrous tissue which is covered
by mucuos membrane and attached to the alveolar
margins of the jaws.

11. o Covered by mucous
membrne and forms a
partition between the oral
and the nasal cavity Media
n
raphe
o The mucous membrane
and the periosteum
cannot be separated
(mucoperiosteum)

12. Movable portion and is attached to the hard palate
Palatine tonsil is also called “Isthmus of Fauces” or the Tonsilar
Sinus

13.  Levator Palatini – brings soft
palate in contact with
posterior pharyngeal
wall, preventing food from
going upward ino the
nasopharynx
 Tensor Palatini – tenses the
soft palate
 Palatoglossus – raises the
tongue
 Uvulae muscle – raises the
uvula

14.  Mobile mass of muscles
lying on the floor of the
mouth and associated
with functions of
taste, chweing, swallowing
and speaking

15. PAPILLAE OF THE
TONGUE
TASTE DISTRIBUTION

16. a. Extrinsic muscles
 responsible for changing
the position of the tongue
a. Gionioglossus
b. Geniohyoid
b. Intrinisic muscles
 change the shape of the
tongue
a. Superior longitudinal
muscles
b. Inferior longitudinal
muscles
c. Transverse muslce
d. Vertical muscles