Histology of the oral caviity

Question 1

The functions of the oral cavity

Answer 1

speech
breathing
facial expression
sensory perception
mechanical and chemical digestion

Question 2

What is mastication??

Answer 2

The process by which ingestion food os made suitable for swallowing.

Question 3

The oral cavity is mainly comprised by what/ of what?

Answer 3

Lips, teeth, tongue, and oral mucosa.

Question 4

saliva is compressed of what ?

Answer 4

is mainly compressed of water and small proportion of electrolytes and proteins.

Question 5

Which component of saliva protect the oral cavity from infections?

Answer 5

IgA protein

Question 6

function of the watery saliva

Answer 6

moistens and lubricates the mastication process while salivary mucus helps bind the bolus ready for swallowing.

Question 7

what membrane lines the oral cavity?

Answer 7

protective mucous membrane- ORAL MUCOSA that sensory receptors for taste.

Question 8

what type of the epithelium layer lines the palate/

Answer 8

has stratified squamous epithelium which is keratinized in some regions, such as the palate, due to increased friction.

also the GINGIVA

they are keratinized to protect the underlying tissues from mechanical forces and toxins

Question 9

Throughout the oral mucosa is numerous small…………?

Answer 9

accessory salivary glands- serous and mucosa glands.

Question 10

3 surfaces of the lip

Answer 10

External surface- hair-bearing skin.

vermilion border- pinkish-red transitional zone of the lip, and derives its colour from the rich vascular dermis which only has a thin lightly keratinized epidermal covering here.

oral mucosa- covering the inner surface of the lip. has stratified squomous epithelium.

Question 11

A muscular organ covered by oral mucosa and has necessary reception for tase and general sensation.

Answer 11

Tongue

Question 12

The body of the tongue consist of what

Answer 12

mass of interlacing buddles of skeletal muscle fibers.

Question 13

Mucous membrane covering the tongue is firmly bound to the underlying muscle via what

Answer 13

dense collagenous lamina propria which is continuous with the epimysium of the tongue muscle.

Question 14

why lamina proper take large mass of area?

Answer 14

to ensure thr tongue is fully functionally

Question 15

Filiform papillae consist of

Answer 15

a dense supporting tissue core and a heavily keratinized surface projection.

Question 16

Fungiform papillae have ?

Answer 16

a thin non-keratinized epithelium and a richly vascularized supporting tissue core which gives a red appearance macroscopically.

Question 17

papillae that is set into tongue surface and encircled by a deep cleft?

Answer 17

circumvallate papillae.

Question 18

Aggregations of serous glands –von Ebner glands open into what?

Answer 18

to the base of the circumvallate cleft and secrete a watery fluid that dissolves food constituents thereby facilitating taste reception.

Question 19

The posterior one-third of the tongue is lined by ?

Answer 19

a smooth stratifeid squamous epithelium

Question 20

The lymphoid tissues contains what

Answer 20

lymphoid follicles.

Question 21

All of the lymphoid tissue contributes to what is known as the

Answer 21

Lingual tonsils

Question 22

what form the waldeyers ring of lymphoid tissues

Answer 22

lingual, palatine and pharyngeal(adenoids) tonsils

Question 23

what penetrate the lingual tonsils and also found on palatine tonsils

Answer 23

Epithelium Crypts

Question 24

Secretory unit of the Salivary gland

Answer 24

Consists of tubulo-acinar structure composed entirely of serous or mucous secretory cells, or a mixture of both.

Question 25

In mixed type where the mucous cells predominate the serous cells form semilunar caps called?

Answer 25

Serous demilunes

Question 26

Intercalated ducts drains into

Answer 26

striated ducts

Question 27

The nuclei of mucous cells

Answer 27

are condensed and characteristically located at the base of the cell

Question 28

CElls the forces secretion from the acinar lumen to the duct system

Answer 28

myoepithelium cells

Question 29

Contractile cells found in both mucous and serous glands

Answer 29

myoepithelium cells

Question 30

These cells are located between

Answer 30

the basal plasma membranes of secretory cells and the basement membrane

Question 31

a condensed nuclei aids ?

Answer 31

to increase surface area for secretion and support contractile fuction

Question 32

Gland is divide into what?

Answer 32

lobules, each containing secretory units

Question 33

Connective tissue………….A) between lobules from an outer caspule and convey blood vessels, nerves and large ……….B)

Answer 33

A.- septa radiate
B- excretory ducts

Question 34

Parotid gland mainly consist of ?

Answer 34

serous secretory glands that are dark stained

Question 35

granules found on serous gland

Answer 35

Zymogen glands

which are cytoplasmic granules containing proteins.

Question 36

A large excretory duct lined by stratified cuboidal epithelium is present in the fibrous tissue septum and is accompanied by blood vessels and nerves

Answer 36

Sublingual gland
This gland contains occasional adipocytes which is a feature found in older individuals

Question 37

submandibular gland

Answer 37

Consists of a mixture of serous and mucous secretory units –usually in the form of mixed secretory units.
However, pure serous and pure mucous units are also found.
Mixed secretory units consist of mucous acini with serous demilunes.