Histogenesis of Face: Tongue: oral Cavity

Question 1

The formation of different tissues from stem cells that are constituents of the primary germ layers

Answer 1

Histogenesis

Question 2

Timeline of Formative events

Answer 2

Formation of Face
Formation of the Tongue
Formation of Palate (primary and secondary) with formation of the oral cavity

Question 3

an organization level involved in the growth and deveolopment of an organ and an organism
The way a particular spatial arrangement (shape) of something occurs

Answer 3

Formation

Question 4

Increase in weight and spatial dimensions (shape) that an organ and orgnaism undergoew

Answer 4

GRowth

Question 5

The growth of an organ or organism through various formative stages on the way to maturation

Answer 5

Development

Question 6

what must occure before growth

Answer 6

Formation

Question 7

TImeline for the formation of the face

Answer 7

3-5 weeks

Question 8

Crown to rump measurement at wek 3

Answer 8

3mm

Question 9

what is the stomodeum

Answer 9

Depression between the brain and pericardium in an embryo

Question 10

when does the stomodeum appear

Answer 10

3rd embryonic wek

Question 11

what does the stomodeum eventually become

Answer 11

The nasal and oral cavities

Rathke’s rouch

Question 12

What does Rathke’s pouch eventually become

Answer 12

Precursor of the anterior lobe of the pituitary

Question 13

Superior
Inferior
Posterior boundries of the stomodeum

Answer 13

Frontal prominence
Cardiac Plate
Buccopharyngeal membrane

Question 14

what makes up the outer and inner surface of the buccopharyngeal membrane

Answer 14

Outer: ectoderm
Inner: endoderm

Question 15

when do Branchial arches and clefts appear and disappear

Answer 15

In the 4th week of embryonic development

Question 16

what does Arch 1 become

Answer 16

Right and Left Maxillary facial processes

Right and left mandibular facial processes

Question 17

ectomesenchyme

Answer 17

Mesenchymal tissues in the branchial arches that originates in the ectoderm

Question 18

size of mandibular and maxillary processes

Answer 18

Maxillary is very large

Question 19

what separates the arches

Answer 19

Branchial clefts, named as the arch above is named

Question 20

the major difference in ectomesenchym and mesenchyme

Answer 20

Ectomesenchym is from neural crest cells from the ectoderm germ layer

Question 21

where does ectomesenchyme form

Answer 21

in the cranial region

Question 22

what does ectomesenchyme help to form

Answer 22

Hard and soft tissues of head and neck (bones, muscle, tooth tissues (denin, cementum, pulp)

Question 23

what does Ectomesenchyme not form in the tooth

Answer 23

not enamel (from the ectoderm in the stomodeum)

Question 24

where the upper maxillary and lower mandibular processes meet at the sides of the stomodeum

Answer 24

Commissura labiorum oris

Question 25

what does the mandibular facial process replace in week 4

Answer 25

The cardiac plate as the lower boundry of the stomodeum

Question 26

What does the maxillary facial process eventually become in the embryo in week 4

Answer 26

The posteriolateral boundaries of the stomodeum

Question 27

where do nasal pits from

Answer 27

within the frontal prominence

Question 28

what does the nasal pits form in the frontal prominence

Answer 28

Median and R and L nasal facial processes

Question 29

the Median And R and L nasal facial processes replace what

Answer 29

Frontal prominence and the superior boundry of the stomodeum

Question 30

what do the nasal pits eventally become

Answer 30

nasal ducts that open into the stomodeum to eventually from the nasal cavities and notrils

Question 31

what does the frontal promince and branchial arch I become

Answer 31

FP: Media, R and L nasla processes | Branchial arch I: R and L maxillary, R and L mandibular

Question 32

what does the median nasal process become

Answer 32

Midline of nose | Philtrum of upper lip

Question 33

What does the lateral nasal process become

Answer 33

Lateral sides of ala of nose | Infraorbital parts of face

Question 34

what do the maxillary processes become

Answer 34

Upper parts of cheeks | Lateral parts of Upper lip

Question 35

what does the mandibular process come

Answer 35

Lower parts of cheek Lower lip Chin

Question 36

what does Branchial cleft I become

Answer 36

external Auditory meatus

Question 37

what does Branchial arch II become

Answer 37

Operculum

Question 38

what does the Operculum cover

Answer 38

Arch III and IV | Cleft II, III, and IV

Question 39

what does the operculum become

Answer 39

Sides of neck below the external auditory meatus

Question 40

what might the operculum cover in the teenage human

Answer 40

The 3rd molars and may become infected

Question 41

what happens if the operculum does not fully fuse

Answer 41

Left with cervical cysts

Question 42

what parts of the face grow the fastest

Answer 42

The upper face grows fast

Question 43

How do the Facial processes meet at week 4

Answer 43

Merge but do not fuse

Question 44

what happens to the groove between the maxillary and median nasal process

Answer 44

Gradually eliminated

Question 45

what happens if the maxillary process or precesses do not merge with the median nasal process by week 5

Answer 45

unilateral or bilateral clefting

Question 46

can the mandible cleft

Answer 46

Yes, but it is rare

Question 47

Crown to rump at week 8

Answer 47

30mm

Question 48

what happens to the buccopharyngeal membrane

Answer 48

Ruptures in fourth embryonic week allowing opening to the foregut - becomes the nasal and oral pharynx

Question 49

where is the buccopharyngeal membrane in the adult

Answer 49

Pillar of fauces

Question 50

when does the tounge lingual swellings begin to form

Answer 50

week 4

Question 51

what are the lingual sweelings

Answer 51

R and L lateral welling Tuberculum impar Copula

Question 52

where do the lingual swellings form

Answer 52

mandibular process of brnahial arch I, II , and III

Question 53

when do the lingual swellings rupture

Answer 53

When the buccopharyngeal membrane ruptures during the 4th week

Question 54

what becomes the anterior 2/3 of the tongue

Answer 54

Tuberculum impar and the 2 lateral lingual swellings

Question 55

what bceomes the posterior 1/3 of the tongue (root)

Answer 55

Copula

Question 56

what does the primary palate arise from

Answer 56

The inner surface of the median nasal facial process

Question 57

what does the nasal septum arise from

Answer 57

The primary palate

Question 58

what do the palatine folds arise from

Answer 58

Inner surface of maxillary facial processes

Question 59

what do the palatine folds lining epithelial connect to

Answer 59

an underlying mesenchymal tisssue called ectomesenchyme

Question 60

when do the palatine folds go from vertical to horizontal possition above th tongue

Answer 60

Week 5

Question 61

what all flows toward each other to form the palate

Answer 61

Palatine folds and nasal septums

Question 62

how does lining epithelia of the palate act when they approach each other

Answer 62

mesenchyme grows until the epithelium Fuses

Question 63

when does the epithelium of the primary palate and palatine folds fuse

Answer 63

Sixth embryonic week

Question 64

how does the epithelium fuse in the palate

Answer 64

From the front of the mouth to the back

Question 65

how is the mesenchyme tissue separated first

Answer 65

Walled off by the epithelium in the palatine folds and the nasal septum

Question 66

break up of the fused epithelium in the palate leads to

Answer 66

Performated epithelium

Question 67

what happens to the perferated epithelium of the palate

Answer 67

Disappeares to form the secondary palate that is completely continuous

Question 68

what happens if the epithelium remains in the palate

Answer 68

Can form a cyst and clefts

Question 69

when does Epithelial fusion and mesenchymal union occur

Answer 69

6-8th week IU