submandibular gland

1. The Oral Cavity & Salivary
Glands

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

4. Openings
2 openings:
Oral fissure:
from vestibule to outside
Oropharyngeal opening (isthmus):
from cavity proper to oropharynx

5. Teeth
2 sets
1. Deciduous (primary) teeth:
5 in each quadrant (?)
start eruption ~ 6m
fully erupted ~ ??
1st primary tooth to erupt is ?

6. 2. Permanent teeth:
8 in each quadrant (?)
Start eruption ~ ??
Fully erupted ~ 12 y (Except?)
*3rd molar = wisdom tooth
(because it erupts at older age)

7. Innervation of The Teeth
Gingivae Teeth

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 ??

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

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

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

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.

20. Lymph Drainage
Tip:
submental L.N.
Lat. Ant. 2/3:
submandibular L.N.
Medial Ant. 2/3:
DCLN
Post. 1/3:
DCLN

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: