part 2 ohe lec

Question 1

Found on the head bounded anteriorly by lips; posteriorly by pharynx,
laterally by cheeks, superiorly by palate

Answer 1

ORAL CAVITY

Question 2

bounded by the lips anteriorly, the cheeks internally and the labial or buccal surfaces of the lower and upper teeth at the posterior.

Answer 2

Oral vestibule

Question 3

bounded by lingual surfaces of upper and lower teeth
anteriorly and laterally hard and soft palate superiorly and sublingual sulcus
and the tongue inferiorly.

Answer 3

Oral cavity proper

Question 3

bounded by lingual surfaces of upper and lower teeth
anteriorly and laterally hard and soft palate superiorly and sublingual sulcus
and the tongue inferiorly.

Answer 3

Oral cavity proper

Question 4

Are structures functionally, associated with the oral cavity.

Answer 4

Para – Oral Tissues

Question 5

The 6 different para oral structures are

Answer 5

a. Lips
b. Cheeks
c. Hard and soft palate
d. Sublingual sulcus
e. Tongue
f. Tonsils
g. Salivary grands
h. Teeth and the supporting structures

Question 6

he largest organ in the mouth located in the floor of the cavity.

Answer 6

Tongue

Question 7

three parts of the tongue

Answer 7

Tip (apex)
Body (Corpus)
Base (root)

Question 8

are numerous fine, pointed, cone-shaped or cub- shaped structure about 2.5mm long
consisting of core of connective tissue.

Answer 8

Filiform papilla

Question 9

are mushroom-shaped or round reddish prominences about 1.5mm long with dome-
shaped top and narrow base processing one or more taste buds

Answer 9

Fungiform papillae

Question 10

are narrow mucosal folds bilaterally located along the posterior
border of the body about 4 to 8 in number and bear taste buds. These are well-
developed at birth and becomes atrophied in matured individua

Answer 10

Foliate papillae

Question 11

are the largest papilla at about 1mm or more the
height is 2.5mm or more in width and 8-10 in numbers arranged in V-shape manner

Answer 11

vallate (circumvallate) papillae

Question 12

shaped intraepithelial organs for taste perception
about 80 microris in height and 40 microns in width. T

Answer 12

Taste Buds

Question 13

(gustatory cells , neuro-epithelial cells) are slender columnar dark staining cells
(hyperchromatic) and elongated nuclei,4 to 20 in number per bud and possess stiff hair like
processes (taste hair) projecting from free surface into the taste pore.

Answer 13

Taste cells

Question 14

(supporting cells). These are the outer cells arranged like staves
of barrel with ovoid or round hypo chromatic nuclei.

Answer 14

Sustentacular cells

Question 15

The lingual muscles are

Answer 15

intrinsic (within the tongue and has different directional paths)
- Vertical (peripheral edge or lateral margin)
- Transverse (from lingual septum)
- Longitudinal (located above and below the transverse muscles*
- Superior longitudinal (dorsal)
- Inferior Longitudinal (ventral)

Question 16

4 Extrinsic muscles

Answer 16

• Styloglossus
• Hyoglossus
• Genioglossus
• Palatoglossus

Question 17

the blood supply of the tongue comes from the lingual artery

Answer 17

Vascular Supply

Question 18

which has the following branches

Answer 18

a. Dorsal Lingual (base of the tongue)
b. Sublingual artery (lingual sulcus)
c. Deep lingual artery (ventral surface body and tip)

Question 19

tongue has plenty of lymphatic supply. The drainage of the
apex is received by submental nodes to the submandibular or
deep cervical nodes. The lymph from the body of the tongue
drains into the submandibular nodes and from the base,
lymph flows to the deep cervical nodes

Answer 19

Lymphatic Supply

Question 20

two nerve supply of the tongue are the lingual nerve which
innervates the apex and the body of the tongue and the
glossopharyngeal nerve which innervates the base or
posterior third of the tongue. The tongue epithelium has three
types of nerve endings.

Answer 20

Nerve supply

Question 21

Are masses of lymphoid tissue with the primary function of producing
lymphocytes and has a role in immunization.

Answer 21

Tonsils

Question 22

ovoid bilateral structures situated in the pharyngeal folds
about 1 by ½ inch.

Answer 22

Two palatine or faucial tonsils

Question 23

are found at the base of the tongue posterior to the vallate papillae.
There are about 35-90 lymphoid units that make up the lingual tonsils

Answer 23

Lingual tonsils

Question 24

located on the median surface of the dorsal wall of the
nasopharynx as longitudinal folds about 3 cms. long

Answer 24

Pharyngeal tonsils (adenoids)

Question 25

Gland which has non-
continuous secretions.

Answer 25

Major Salivary glands (Extrinsic gland)