2. Oral Cavity
The cavity that extends from lips to pharynx & contains the
tongue & teeth
2 parts:
1. Vestibule:
space between ?
contains ?
divides into sulci: labial & buccal
2. Oral cavity proper:
enclosed by teeth
* The vestibule communicates with cavity proper at: 1. ?? & 2. ??
3. Oral Cavity Proper
Space that enclosed by teeth & bounded:
Roof: hard palate
Floor: reflection of M.M. under the tongue
Ant.: communicates with Vestibule
Post.: communicates with oropharynx
8. The Tongue
A muscular organ that covered with mucous memb.
Divides
Oral part: ant. 2/3
Pharyngeal part: post. 1/3
Surfaces:
Palatal (dorsal)
Tip & margins (opposite?)
Lower surface (ventral, opposite?)
Root:
connects tongue to ??
9.
10. Dorsum of The Tongue
Median fissure
fibrous septum
Sulcus terminalis:
V-shaped ridge, separates?
Foramen cecum: (blind opening)
at apex of sulcus term.
marks the site of ?
Lingual papillae: 4 types
filiform
smallest & numerous
fungiform
tip & margins
vallate
8-12, in front of ?
foliate
linear folds, on the sides
near terminal sulcus
11.
12. Lingual Tonsil:
aggregation of L. nodules
on post. 1/3 of the tongue
part of Waldeyer’s ring
(4 kinds of tonsils)
13. Ventral Surface of The Tongue
Covered by smooth & thin m.m.
1. Frenulum:
fold of m.m. connects …
2. Deep ling. Artery & vein
from??
3. Fimberiated fold
14.
15. Muscles of The tongue
2 types
Intrinsic:
not attached to bone
3 directions:
longi., transv., & vertical
innervation?
Action:
change tongue shape
Extrinsic:
4 (5?) muscles
16.
17. Innervation to The Tongue
Sensory:
general: Ant. 2/3 ?
Post. 1/3 ?
Special: Ant. 2/3 ?
Post. 1/3 ?
Motor: ??
18. Arterial Blood Supply to The Tongue
Lingual a.:
from??
pass deep to hyoglossus m.
Branches: 3?
Tonsillar a.
from ?
Ascending pharyngeal a.
19.
20. Lymph Drainage
Tip:
submental L.N.
Lat. Ant. 2/3:
submandibular L.N.
Medial Ant. 2/3:
DCLN
Post. 1/3:
DCLN
21.
22. Genioglossus & Airway Patency
Genioglossus m. is under constant state of contraction, to prevent
the tongue from collapsing posteriorly & obstructing airway.
- Hypercontraction = ??
* When the pt. is deeply
anesthetized
genioglossus may relaxed &
The base of the tongue
moves posteriorly
23. Submandibular Salivary Gland
Mixed gland (mucous & serous, mainly ?)
Rests on post. Border of ??
2 parts: large superficial
small deep
* Relations to superficial & deep parts:
24. Submandibular duct (Warton’s)
same length as parotid duct
(~ 5cm)
arises from deep part of the gland
pass ant.
opens beside the frenulum
(sublingual papilla)
25. Sublingual Salivary Gland
Mixed gland (mainly ?)
Beneath m.m. of floor of mouth
Opens into the floor of mouth:
8-20 ducts (subling. Fold)
* Relations to the gland: