DEVELOPMENT OF THE TONGUE

Question 1

the tongue comes from ——pharyngeal arches

Answer 1

1-4th

Question 2

line of fusion of the anterior 2/3 with the posterior 1/3 is indicated by a —-shaped groove called the—-

Answer 2

V-

terminalis sulcus

Question 3

ANTERIOR 2/3 Of The Tongue

• 2 lateral——(aka ——-) appear—— to the tuberculum impar
• they overgrow the——- ,—— , and become the anterior 2/3 of the tongue

Answer 3

lingual swellings

distal tongue buds

distal

tuberculum impar

Question 4

Median—— swelling called ——develops from the floor of the—— just cranial to the——

By the—- week ——

Answer 4

triangular

tuberculum impar

primitive pharynx

foramen caecum

end
4

Question 5

DORSAL SURFACE OF THE TONGUE

• the line of fusion of the——- in the—— plane forms the——
• tuberculum impar forms—— part of the adult tongue
• mucous Membrane covering the anterior 2/3 of the tongue Is from—— pharyngeal arch, it’s therefore innervated by the——

Answer 5

2 lingual swellings

median

median sulcus on the dorsal tongue

no recognizable

1st
mandibular nerve of trigeminal

Question 6

POSTERIOR 1/3 Of The Tongue

• a second large—— swelling called———(aka——) develops caudal to the—— (extends through the regions of the—— arch)
• it soon divides into large—- and small—— part
• ——of the tongue including the——- develops from—— part of the swelling

Answer 6

median

hypobranchial eminence ; copula of His

tuberculum impar

2nd-4th

cranial; caudal

Posterior part ;circumvallate papillae ;

Question 7

-mucous Membrane of the posterior 1/3 of the tongue including ——-Is from—- pharyngeal arch, it’s therefore innervated by the—— nerve

Answer 7

circumvallate papillae ; 3rd

glossopharyngeal

Question 8

POSTERIOR MOST

• posteriormost part of the tongue and——- develop from the—— part of the_____ (—-arch)
• mucous Membrane of the posteriormost part of the tongue including the—— Is from—- pharyngeal arch, it’s therefore innervated by the ——-nerve

Answer 8

epiglottis

caudal; hypobrachial eminence; 4th

epiglottis; 4th

superior laryngeal

Question 9

During these sequence of events, the—- arch mesoderm grows over the mesoderm of the—— arch and fuses with the mesoderm of the—— arch. Thus,—- arch gets buried underneath the—- arch and thereby gets excluded from the tongue development

Answer 9

third

second

first

second

third

Question 10

MUSCLE OF THE TONGUE

——-migrate with the—— nerve to the———-(aka ——-) to form the muscles of the tongue

Answer 10

occipital myotomes

hypoglossal

stomodeum

primitive mouth

Question 11

At birth both the—- and—— parts of the tongue are located within the——;
-later the——- of tongue descends into the—— by age ——and forms its——.

Answer 11

anterior; posterior; oral cavity

posterior third; oropharynx;4; anterior wall

Question 12

The beer is tasted at the——- part of the tongue which is supplied by the——— nerve. For this reason, that nerve is also called ‘——-nerve.’

Answer 12

posterior most; internal laryngeal

beer drinker’s

Question 13

-Mucous membrane of the tongue is derived from the—— of the primitive —-gut.

Answer 13

endoderm

fore

Question 14

Taste buds are formed in relation to the ——-of nerves carrying taste sensations.

Answer 14

terminal branches

Question 15

Fibroareolar tissue that—- the—— develops from——-

Answer 15

binds

Tongue muscles

mesenchyme of the pharyngeal arches.

Question 16

taste buds of anterior two-third of the tongue=—— arches= ——nerve of——

Answer 16

second

Chorda tympani

CN7

Question 17

A sulcus called—— sulcus develops on either side of —— and separates the ——-from the——

Answer 17

linguogingival

The primordial tongue

developing tongue

floor of the mouth.

Question 18

Aglossia:
——-of tongue
-rare or common???
-occurs due to——-

Answer 18

absence

Rare

complete agenesis of tongue primordia

Question 19

Hemiglossia:
——-tongue
-occurs when——- fails to develop

Answer 19

half

one of the lingual swelling

Question 20

Ankyloglossia Superior:

-tongue is attached to the——-

Answer 20

palate

Question 21

Bifid tongue:
-when—— portion of tongue—-
-caused by failure of—— to——
———always have bifid tongues

Answer 21

anterior; splits into 2

lingual swellings; fuse

snakes

Question 22

——-of tongue and hypertrophy of the——-:

-It is a characteristic of infants with——-

Answer 22

Fissuring

lingual papillae

Down’s syndrome.

Question 23

Development of Palate

• two parts: —— palate and ——- palate.
• P palate is from the—— process and——- palate is from the ———processes.
• begins in the sixth week and completes by the end of the ——-week.

Answer 23

primary

secondary

frontonasal

secondary

maxillary

twelfth

Question 24

Development of Primary Palate

• formed by fusion of two ———processes of the frontonasal process
• The fusion of these processes (at a—— level) forms a——-shaped mass of mesenchyme opposite——- carrying four—— teeth called primary palate.
• It ossifies to form——-.

Answer 24

Medial

deeper; wedge

upper jaw

incisor

premaxilla

Question 25

palatine shelves are shelf like outgrowths from—- aspect of—- process

Answer 25

inner

maxillary

Question 26

-secondary palate is formed by fusion of the——

Answer 26

palatine shelves

Question 27

Palatine shelves :
Appear in week—-?
Assume final position by week—-?

Answer 27

6

7/8

Question 28

The secondary palate is the primordium of most of—- part and whole of—- part of the adult palate.

Answer 28

hard

soft

Question 29

Once the palatine shelves are fused the ossification extends from the—- and—— bones into these shelves to form the hard palate.

Answer 29

maxillae

palatine

Question 30

Development of Permanent Palate

• Anteriorly the—- palate fuses with the—— palate by a—–shaped suture and each limb of it passes between the—— and—— teeth.
• Junction between the—- and——- palates is represented in adults by ——- into which opens——-

Answer 30

secondary; primary; Y

lateral incisor

canine

primitive; secondary

incisive fossa

two incisive foramina.

Question 31

The nasal septum grows down and joins—- aspect of anterior ——of the—— palate in the midline.

Answer 31

superior; three-fourth

hard

Question 32

The fusion between nasal septum and secondary palate begins—- during the___ week and is completed—- by the—— week.

Answer 32

anteriorly

ninth

posteriorly

twelfth

Question 33

Incomplete or partial cleft palate
The follow-ing types may occur.
-Bifid uvula:
Cleft involving——-.

Cleft of the soft palate:
Involving—- and part of the——

-Cleft of the soft palate:
Involving—-, whole of the——, and extends into the——-

Answer 33

only uvula

uvula; soft palate

uvula; soft palate

hard palate.

Question 34

Unilateral complete cleft palate
occurs if—— process on one side does not fuse with the——-.
It is always associated with the—- on the—- side.

Answer 34

maxillary; premaxilla

cleft lip; same

Question 35

Bilateral complete cleft palate
occurs if ——-fail to fuse with the——.
In this type,—— palate is divided into two equal halves by a median cleft with an anterior V-shaped cleft separating the____ completely.

Answer 35

both the maxillary processes

premaxilla

secondary

premaxilla

Question 36

Development of taste buds starts in __ ti ___ week

Nerves from taste buds begin connecting to the brain. In ___ to ___ week

Many taste buds are able to transmit taste signals to the brain by __ week

Your baby can taste sweet, sour, and bitter flavors by ____

Reactions to salty foods come later, usually by___

Answer 36

11-13

13-15

20

Birth

6month