Specialized mucosa

Question 1

Talk about specialized Mousa on dorsal surface of tongue

Answer 1

Taste buds-tongue papillae-lingual tonsil

Present on the dorsal surface of the tongue

is divided by V shaped sulcus terminalis into:-papillary part (ant.2/3)
lymphatic part (post 1/3).

Question 2

Talk about filiform papillae

Answer 2

high, narrow conical structures
arranged in parallel rows
near the post. 1/3 become parallel to sulcus T.

central core of C.T. covered by keratinized str. sq. epithelium.

­Has 1­-2 secondary papillea.

­Does not contain taste buds, but has a mechanical function

Question 3

Talk about fungiform

Answer 3

Present in between filiform papillae.
mushroom­like structures
central core of primary C.T. papilla
covered by stratified squamous non­keratinized ­

2RY C.T. papillae make the B.V near surface of epithelium

appears red .
­Contains 1­-2 taste bud

The numerous papillae on the tip of the tongue are responsible for sweet sensation.

The papillae on the lateral borders are responsible for salt sensation.

Chorda tympani is responsible for these sensation

Question 4

Talk about circumvallate

Answer 4

8­12 in number 
Present e anterior to sulcus terminalis.
do not protrude above the surface of the tongue
embedded in the tongue
surrounded by deep trough
wall of the trough contains taste bud
narrow base 
wide surface 

central core of C.T. which sends 2ry C.T. papillae to the stratified squamous non­keratinized epithelium.

responsible for the bitter sensation
nerve supply is by glossopharyngeal nerve

In the C.T. in the base of the trough von Ebner salivary glands are present

Question 5

Talk about functions of von Ebner salivary glands

Answer 5

Clean the food deprise in the trough to prepare the taste bud for new taste sensation.

­Dissolves the food to help the taste function.
In infant secretes lipase enzyme

Question 6

Talk about foliate papillae

Answer 6

presents at lateral sides of sulcus terminalis.
sharp parallel clefts
­Surrounded by troughs
von Ebner salivary g. opens in walls of troughs
covered by stratified squamous nonkeratinized Contains taste buds.
Responsible for the Sour sensation
Nerve supply is by glossopharyngeal nerve

Question 7

What are other names of outer , inner suporting cells & neuroepthelial cells

Answer 7

Outer & inner : sustainecular cells

Neuroepithelial : receptors to taste stimuli

Question 8

What is type of weber salivary gland & von ebner

Answer 8

weber : mucus

von ebner : serous

Question 9

Talk about taste bud

Answer 9

all tongue papillae except filiform
Soft palate.
Posterior surface of epiglottis.
ovoid
rounded base toward C.T
pointed end at the outer surface (taste pore).
­Outer supporting cells arranged like layers of onion .

­Inner supporting cells, rode shape cells with basal nuclei.

Neuroepithelial cells
10-12 in number 
present between the inner supporting calls.
slender
basal darkly stained nucleus

apical stiff bristle­like process extends to the space beneath the taste pore.

­The taste bud is about 80 in height and 40 in width.
­Nerve plexus is present in C.T. below the taste bud

Question 10

Talk about lingual tonsil

Answer 10

small rounded or oval elevations

due to aggregation of lymphatic nodules in the underlying C.T. known as lingual follicle

lingual follicles are covered by stratified sqamous non­keratinized epithelium

L.follicle extend down in many sites to form lingual crypt

composed of germinal centers and lymphatic tissue fills the spaces between these centers

Ducts from underlying Weber mucous salivary g open into the bottom of the lingual crypt.

Lingual tonsil forms a part of the lymphatic ring between mouth and nose from one side and the pharynx on the other side