Anatomy Chapter 5 Tongue Development

Front 1

When does the tongue develop?

Back 1

4-8 weeks

Front 2

What does the tongue develop from?

Back 2

Independent swellings located internally on the floor of the primary pharynx which is formed by the 4 branchial arches

Front 3

The body of the tongue develops from what branchial arch?

Back 3

First branchial arch (Mandibular arch )

Front 4

The base of the tongue develops from what branchial arches?

Back 4

2nd, 3rd, and 4th

Front 5

The furrows between the swellings are eliminated by what?

Back 5

Fusion

Front 6

BODY of TONGUE FORMATION

Back 6

.....

Front 7

The tongue development begins as a what?

Back 7

triangular median swelling (Tuberculum Impar)

Median Tongue bud

Front 8

Where is the single tuberculum impar located?

Back 8

Midline on the floor of the primitive pharynx within the embryos conjoined nasal and oral cavities

Front 9

Later what develops on each side of the tuberculum?

Back 9

Two oval lateral lingual swellings

aka (distal tongue buds)

Front 10

what are the anterior swellings are from what?

Back 10

Mesenchyme of the first branchial arch

Front 11

What do the paired lateral lingual swellings do?

Back 11

Grow in size and merge with each other

Front 12

Then the two fused swelling overgrow and do what and form what?

Back 12

Encompass the disappearing tuberculum impar

Form the anterior 2/3 of the tongue (BODY) which lies within the oral cavity proper.

Front 13

How much of the tongue is the body?

Back 13

2/3

Front 14

What is the site of fusion of the two lateral lingual swellings?

Back 14

Median lingual sulcus

Front 15

Does the tuberculum impar form any recgonizable parts of the mature tongue?

Back 15

NO

Front 16

Around the lingual swellings cell degenerate forming what?

Back 16

A Sulcus

Front 17

What does the Sulcus do?

Back 17

Frees the body of the tongue from the floor of the mouth Except for the attachment of the midline lingual frenum

Front 18

BASE OF TONGUE FORMATION

Back 18

.....

Front 19

What forms posterior to the 1st branchial arch?

Back 19

Paired swellings (Copula)

Front 20

The Copula is formed from the fusion of what?

Back 20

Mesenchyme of mainly the third branchial arch and part of the 4th

Front 21

What does Copula gradually overgrow to form the base of the tongue

Back 21

Second Branchial Arch (Hyoid arch)

Front 22

The base of the tongue is how much of the tongue?

Back 22

Posterior 1/3

Front 23

Even farther posterior to the copula is the projection of a third median swelling named what?

Back 23

Epiglottic Swelling

Front 24

What does the Epiglottic Swelling form from?

Back 24

Mesenchyme of the posterior parts of the fourth branchial arches

Front 25

What does the Epiglottic Swelling mark

Back 25

development of the most posterior region of the tongue and of the future epiglottis

Front 26

COMPLETION OF THE TONGUE

Back 26

.....

Front 27

What happens in the 8th week

Back 27

The copula of the tongue base merges with the anterior swellings of the 1st branchial arch of the tongue body

Front 28

The fusion of the copula and the anterior swellings is demarcated by what?

Back 28

Sulcus Terminalis of the mature dorsal of the tongue

V shaped groove

Front 29

The Sulcus Terminalis marks what?

Back 29

Border between the base of the tongue and its body

Front 30

The Sulcus Terminalis points backwards towards what?/

Back 30

Oropharynx at a small pit like depression which is the Foramen Cecum

Front 31

Foramen Cemum is the begining of what?

Back 31

Thryoglossal duct

Front 32

The Thryoglossal duct is what?

Back 32

The origin of and pathway showing the migration of the thyroid gland into the neck region

Front 33

At the end of what week has the tongue completed the fusion between the swellings?

Back 33

8th week

Front 34

Between birth and puberty what does the tongue do?

Back 34

Doubles in length, breadth, and thickness

Front 35

The Intrinsic muscles of the tongue are believed to orginate from what?

Back 35

Somites

Front 36

When do the taste buds appear

Back 36

11th to 13th week

Front 37

MALFORMATIONS OF TONGUE AND PALATE

Back 37

....

Front 38

Ankloglossia is what kind of Developmental Disturbance?

Back 38

Tonge

Front 39

What is another name for Ankloglossia

Back 39

Tongue Tied

Front 40

What causes Tongue Tied?

Back 40

Short Attachment of the lingual frenum that extends to the tongues apex

Front 41

Cleft Palate is caused from what?

Back 41

Failure of fusion of the palatal shelves with the primary palate or with each other

Front 42

This disease can be caused from what?

Back 42

Hereditary Factors

Environmental Factors

Front 43

What does cleft palate involve?

Back 43

involve only the soft palate or may extend through the hard palate

Front 44

Which is less common cleft palate or cleft lip

Back 44

Cleft Palate

Front 45

Cleft palate is more common in what sex?

Back 45

Females

Front 46

Cleft Uvula is the least complicated True or False

Back 46

True