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Flashcards in The Oral Cavity Deck (48):
1

oral cavity:

consists of two parts:
- ___: cleft separating the lips & cheeks from the gums & teeth
- ___: everything else

vestibule
oral cavity proper

2

oral cavity:

the mucous membrane of the oral cavity is lined by (keratinized/non-keratinized), stratified, squamous epithelium, except for the gums & hard palates, which are (keratinized/non-keratinized)

the oral cavity proper is the space b/n the upper & lower ___ arches (___ & ___ process) & the teeth

non-keratinized
keratinized

dental arches
maxillary & mandibular alveolar processes

3

oral cavity:

the roof is formed by the ___

the floor is mostly ___ & is largely occupied by the ___

hard palate

muscular
tongue

4

oral cavity:

the vestibule communicates w/ the exterior via the ___ fissure b/n the ___

the oral cavity proper communicates posteriorly w/ the ___ via the ___, which passes b/n the palatoglossal arches & the tongue

oral fissure
lips

oropharynx
oropharyngeal isthmus

5

oral cavity:

___ & ___: connect the upper & lower lips to the alveolar processes

upper & lower labial frenual

6

oral cavity:

___: midline fold connecting the tongue to the floor of the mouth

lingula frenulum

7

oral cavity:

___: openings of the submandibular ducts into the floor of the mouth opposite the lingual frenulum

sublingual caruncle (papilla)

8

oral cavity:

___: formed by the sublingual glands running in the direction of the sublingual caruncle (papilla)

small ducts of sublingual glands open along the ___

sublingual folds

folds

9

oral cavity:

___: lie on either side of the lingual frenulum

deep lingual veins

10

oral cavity:

___: opening of the parotid duct (stenson's duct) into the vestibule opposite the second upper molar tooth

parotid papilla

11

the tongue:

mobile mass of (smooth/skeletal/cardiac) muscle covered by mucous membrane

anterior two-thirds (___) lies in the ___

posterior one-third (___) lies in the ___

skeletal

body
oral cavity

root
oropharynx

12

the tongue:

___: inverted v-shaped groove separating the anterior two-thirds from the posterior one-third of the tongue

___: located at the junction of the two limbs of the sulcus terminalis (site of the embryonic thyroglossla duct)

sulcus terminalis

foramen cecum

13

the tongue:
lingual papillae:

upfoldings of the mucous membrane covering the (dorsal/ventral) surface of the (anterior two-thirds/psosterior one-third) of the tongue

four types (4)

dorsal
anterior two-thirds

filiform papillae
fungiform papilla
foliate papillae
circumvallate papilla

14

the tongue:
lingual papillae:
filiform papillae:

conical shaped projections arranged in (columns/rows) which diverge from the ___ & run parallel to the ___

(have/lack) taste buds (along surface from CN ___)

rows
midline
sulcus terminalis

lack

15

the tongue:
lingual papillae:
fungiform papillae:

scattered throughout the ___ papillae

more common along the (tip/back) of tongue

appear as red dots due to rich ___ supply & ___

(apex/base) large & rounded, (apex/base) narrower

(have/lack) taste buds (along surface from CN ___)

filiform papillae

tip

blood supply
transparency

apex
base

have
CN VII

16

the tongue:
lingual papillae:
foliate papillae:

(medial/lateral) upfoldings of the tongue

(well/poorly) developed in humans

(have/lack) taste buds (along lateral surface from CN ___)

lateral

poorly

have
CN VII

17

the tongue:
lingual papillae:
circumvallate papillae:

about a dozen or so arranged in a row just in front of the ___

much (smaller/larger) than fungiform or foliate types

(have/lack) taste buds (numerous along the sides from CN ___)

sulcus terminalis

larger

have
CN IX

18

the tongue:
posterior one-third of the tongue:

___ tonsils on surface

___: reflections of mucosa onto the epiglottis

___: depressions b/n the glossoepiglottic folds, contain some taste buds (CN ___)

lingual

median & lateral glossoepiglottic folds

valleculae
CN X

19

the tongue:
nerve innervation of the tongue (CN ___):

general sensation (e.g., touch, tepmerature, pain) for the anterior two-thirds of the tongue: ___

taste for the anterior two-thirds: ___

general sensation & taste for the posterior one-third of the tongue: ___

general sensation & taste in the valleculae of the tongue: ___

motor to all muscles of the tongue: ___ (except the palatoglossus: ___)

lingual nerve (CN V3)

chorda tympani (CN VII)

lingual branch (CN IX)

internal laryngeal nerve (CN X)

hypoglossal nerve (CN XII)
(CN X)

20

the tongue:
blood supply:

___ artery & branches (3)

lingual artery
- dorsal lingual
- sublingual branch
- deep lingual

21

the tongue:
blood supply:
lingual artery:

originates from the ___ artery just behind the ___ of the ___ bone

passes (superficial/deep) to the hyoglossus muscle

external carotid artery
greater horn of the hyoid bone

deep

22

the tongue:
blood supply:
lingual artery:
dorsal lingual:

passes (upward/downward) to supply the ___ of the tongue

upwrd
dorsum

23

the tongue:
blood supply:
lingual artery:
sublingual branch:

passes forward b/n the ___ & ___ muscles to supply these, the ___ muscle, & the ___ gland

mylohyoid & genioglossus muscles

geniohyoid muscle

sublingual gland

24

the tongue:
blood supply:
lingual artery:
deep lingual:

runs forward supplying the (upper/lower) surface of the tongue

accompanied by the ___ vein

lower

deep lingual vein

25

the tongue:
blood supply:
venous drainage:

the deep lingual vein starts out w/ the ___ artery, but becomes separated by the ___ muscle

the deep lingual & sublingual veins form the ___

the dorsal lingual vein joins the above to form the ___ vein which opens into the ___ vein

deep lingual artery
hyoglossus muscle

vena comitans nervi hypoglossi

lingual vein
internal jugular vein

26

muscles of the tongue (6)

intrinsic
extrinsic
genioglossus
hyoglossus
styloglossus
palatoglossus

27

muscles of the tongue:
intrinsic muscles:

located entirely within the ___ & have no ___ attachments

arranged as (longitudinal/circular), transverse, & (horizontal/vertical) sheets

responsible for major ___ changes in speech & swallowing

tongue
bony

longitudinal
vertical

shape

28

muscles of the tongue:
extrinsic muscles:

arise from ___ attachments (inside/outside) the tongue

bony
outside

29

muscles of the tongue:
genioglossus muscle:

nerve: ___

action:
- pulls tongue (forward/backward) & (protrudes/retracts) it
- assists in creating a central furrow during ___
- anterior fibers (protrude/retract) the (protruded/retracted) tip of the tongue

hypoglossal nerve

forward
protrudes

swallowing

retract
protruded

30

muscles of the tongue:
hyoglossus muscle:

nerve: ___

action: (elevates/depresses) the tongue

hypoglossal nerve

depresses

31

muscles of the tongue:
styloglossus muscle:

nerve: ___

action:
- pulls tongue (upward/downward) & (forward/backward)
- assists in creating a central furrow during ___

hypoglossal nerve

upward
backward

swallowing

32

muscles of the tongue:
palatoglossus muscle:

nerve: ___ via ___ plexus

action:
- (elevates/depresses) the palate
- moves the ___ arch toward the midline
- (elevates/depresses) the back of the tongue

vagus nerve via pharyngeal plexus

elevates

palatoglossal

elevates

33

related muscles of the tongue (4)

digastric
mylohyoid
geniohyoid
stylohyoid

34

related muscles of the tongue:
digastric:

nerve:
- anterior belly: ___
- posterior belly: ___

action:
- (elevates/depresses) hyoid
- (elevates/depresses) mandible

V3
VII

elevates
depresses

35

related muscles of the tongue:
mylohyoid:

forms sling across the (roof/floor) of the mouth

nerve: ___

action:
- (raises/lowers) the hyoid & the tongue (swallowing)
- (elevates/depresses) the mandible

floor

V3

raises
depresses

36

related muscles of the tongue:
geniohyoid:

(superficial/deep) to the mylohyoid

nerve: ___ via ___

action:
- (rasies/lowers) the hyoid
- (elevates/depresses) the mandible

deep

C1 via the hypoglossal nerve

raises
depresses

37

related muscles of the tongue:
stylohyoid:

closely applied to the ___

nerve: ___

action: (raises/lowers) the hyoid & pulls it (anteriorly/posteriorly)

posterior belly of the digastric

VII

rasies
posteriorly

38

the submandibular gland:

large u-shaped gland, wraps around the (anterior/posterior) free border of the ___ muscle

has ___ & ___ parts, which are continuous over the above border

posteroir
mylohyoid muscle

superficial
deep

39

the submandibular gland:
superficial part:

wedged b/n the ___ of the ___ & the ___ muscle

laterally, it is related to the ___ fossa

body of hte mandible
mylohyoid muscle

submandibular fossa

40

the submandibular gland:
deep part:

lies in the space b/n the ___ muscle (lateral) & the ___ & ___ muscles (medial)

mylohyoid muscle

styloglossus & hyoglossus muscles

41

the submandibular gland:
submandibular duct:

emerges from the (superficial/deep) part of the gland

crossed laterally by the ___ nerve, then runs anteirorly b/n the ___ gland & the ___ msucles

enters the floor of the mouth at the ___ beside the base of the ___

deep

lingual nerve
sublingual gland
genioglossus muscles

sublingual caruncle (papilla)
lingual frenulum

42

the sublingual glands:

the most (superficial/deep) structure in the (roof/floor) of the mouth

almond shaped gland which forms the ___ folds

superficial
floor

sublingual folds

43

the sublingual glands:
relations:

superior: ___ membrane
inferior: ___ muscle
lateral: ___ fossa of the ___
medial: ___ duct, ___ nerve, ___ muscle

mucous membrane

mylohyoid muscle

sublingual fossa of the mandible

submandibular duct
lingual nerve
genioglossus

44

the lingual nerve:

arises from the ___ nerve in the ___ fossa & is joined by the ___ from the ___ nerve

mandibular nerve (V3)
infratemporal fossa
chorda tympani
facial nerve (VII)

45

the lingual nerve:

during its course, the lingual nerve is closely related to the ___ tooth & can be damaged during ___ of the tooth

passes forward across the ___& ___ muscles

third molar tooth
extraction

styloglossus & hyoglossus muscles

46

the lingual nerve:

the ___ ganglion is suspended from the lingual nerve as it lies on the ___ muscle, above the deep part of the ___ gland

crosses the lateral surface of the ___ duct, then winds below it, & upward on its (medial/lateral) side

submandibular ganglion
hyoglossus muscle
submandibular gland

submandibular duct
medial side

47

important relations of the hyoglossus muscle:
deep to the muscle:

___ artery
___ nerve

lingual artery
glossopharyngeal nerve

48

important relations of the hyoglossus muscle:
superficial to the muscle (anterior portion):

superior level (lateral to medial or superficial to deep):
___ gland
___ duct
___ nerve

inferior level:
___ nerve
___

sublingual gland
submandibular duct
lingual nerve

hypoglossla nerve
vena comitantes nervi hypoglossi

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