Development Of Orofacial Structures- Chapter 5

Front 1

How is the palate formed?

Back 1

From two separate embryonic structures

Front 2

What two structures form the palate?

Back 2

the primary and secondary palate

Front 3

When does palatal formation begin and end?

Back 3

in the fifth week in the embryonic perid, completed in the 12th week in the fetal period

Front 4

What three stages does the palate develop?

Back 4

1.primary palate formation
2.secondary palate formation
3.completion of the palate

Front 5

Intermaxillary segment gives rise to the________ _______.

Back 5

Primary palate

Front 6

The intermaxillary segment forms as a result of fusion of 2 _________ _________.

Back 6

medial nasal processes

Front 7

The primary palate develops into _________________.

Back 7

the floor of the nasal pits and nasal septum on the inside of the stomodeum.

Front 8

The bilateral maxillary processes give rise to the two_______.

Back 8

Palatal Shelves

Front 9

The primary palate serves as a partial seperation between what two developing cavities?

Back 9

oral and nasal

Front 10

in the future the primary palate will form the ________.

Back 10

premaxillary portion of the maxilla, the anterior one third of the final, or definitive palate.

Front 11

In the sixth week the ____ is forming in the floor of the pharynx.

Back 11

tongue

Front 12

By the ________ week the tongue is confined to the oral cavity proper.

Back 12

eighth

Front 13

The palatal shelves form the______ palate.

Back 13

Secondary

Front 14

Three processes form the final palate during the ____week.

Back 14

12th

Front 15

The secondary and primary palate fuse and the ______ is complete; the oral and casal cavity are not separated.

Back 15

palate

Front 16

Failure of fusion of the palatal shelves with the primary palate or with each other can result in _____________.

Back 16

Cleft lip

Front 17

Mildest form of cleft palate; with or without cleft lip

Back 17

Cleft uvula

Front 18

The _________ cavity forms at the same times as the palate; will serves as part of the respiratory system.

Back 18

nasal

Front 19

Is a growth of from the fused medial nasal processes; the tissues will grow inferiorly and deep the the medial nasal processes and superior to the stomodeum.

Back 19

nasal septum

Front 20

The vertical nasal septum fuses with the horizontally final palate; this fusion begins in the ______ week and is completed in the ________week.

Back 20

9th, 12th

Front 21

In what week does the tongue begin to develop?

Back 21

the 4th week

Front 22

When is tongue development completed?

Back 22

8th

Front 23

Forms from swellings located on the floor of the primitive pharynx.

Back 23

Tongue

Front 24

The tongues body is formed by the___________ branchial arches.

Back 24

the first four

Front 25

The tongues base originates from the _____,______, and the _______ branchial arches.

Back 25

second, third and fourth

Front 26

The tongue development begins as a triangular median swelling known as ________ _____.

Back 26

tuberculum Impar/median tongue bud

Front 27

The tuberculum impar is located in the midline at the floor of the primitive________.

Back 27

pharynx

Front 28

Develop on each side of the tuberculum impar.

Back 28

Lateral lingual swellings/distal tingue buds

Front 29

What are the anterior swellings from?

Back 29

from the growth of mesenchyme of the first branchial arches.

Front 30

The paired lateral lingual swellings grow and merge with each other and encompass the disappearing __________, to form the anterior two thirds, or body, of the tongue..

Back 30

Tuberculum impar

Front 31

The median lingual sulcus is a superficial demarcation of the line of ________ of the two lateral lingual swellings.

Back 31

fusion

Front 32

Posterior to the lateral lingual swellings, a pair of swellings become evident; formed from the fusion of the mesenchyme of the third and fourth branchial arches.

Back 32

Copula

Front 33

Even more posterior to the copula is the projection of a third median swelling known as the______.

Back 33

epiglottic swelling

Front 34

In the mature tongue, an inverted v-shaped groove marking the border between the base and body of the tongue.

Back 34

Sulcus terminalis

Front 35

The sulcus terminalis points backwards toward the oropharynx at a small pilike depression know as the __________.

Back 35

foramen cecum

Front 36

Point of fusion of the tongue.

Back 36

Median lingual sulcus

Front 37

Dissappears as the lingual swellings fuse together.

Back 37

Tuberculum Impar

Front 38

The origin and pathway showing the thyroid's migration into the neck region.

Back 38

Thyroglossal duct

Front 39

At the end of the eigth week the ____ moves out of the pharynx and into the oral cavity proper.

Back 39

tongue

Front 40

Intrinsic muscles originate from the___________.

Back 40

Mesoderm

Front 41

The tongue is innervated by the____________________.

Back 41

Hypoglossal nerve, glossopharyngeal and the chora tympani branches of the facial nerve.

Front 42

Tongue-tied; results in a short lingual frenum that extends to the tongue apex and restricts movement.

Back 42

Ankyloglossia

Front 43

The lingual papillae, small elevated structures of specialized mucosa, appear toward the end of the _________week.

Back 43

eighth

Front 44

What types of papillae appears first? Near the terminal branches of the glossopharyngeal nerve.

Back 44

Circumvallate and foliate-lateral parts of the tongue

Front 45

Papillae that appears later, near the terminations of the chorda tympani branches of the facial nerve.

Back 45

Fungiform