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Oral Histology > Ex 1- Formation of Face, Tongue, and Oral Cavity > Flashcards

Ex 1- Formation of Face, Tongue, and Oral Cavity Flashcards

1
Q

What is the order in which the face, oral cavity, and tongue develop?

A
  1. face 2. tongue 3. oral cavity
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2
Q

______ is an organization level involved in the growth and development of an organ and an organism

A

formation

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3
Q

_____ is an increase in weight and spatial dimensions (shape) that an organ or organism undergo

A

growth

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4
Q

_______ is the growht of an organ or organism through various morphologic stages on its way to maturity

A

Development

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5
Q

The formation of the face occurs btw embryonic weeks __-___

A

3-5

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6
Q

The crown rump measurement in week 3 is ____ mm and by week 8 in utero it is ____ mm

A

3 mm 30mm

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7
Q

The stomodeum appears in the ____ embryonic week and becomes the nasal and oral cavities btw ___ and ___ embryonic weeks

A

3rd 6-8th

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8
Q

What are the boundaries of the stomodeum during the third embryonic week?

A

-frontal prominence (superior) - cardiac plate (inferior) -buccopharyngeal membrane (posterior)

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9
Q

What type of epithelium lines the stomodeum?

A

ectoderm

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10
Q

What type of epithelium makes up the buccopharyngeal membrane?

A

endoderm

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11
Q

The 4 pairs of branchial (pharyngeal) arches and clefts, appear and disappear during the ____ embryonic week

A

4th

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12
Q

What does Arch 1 become during the 4th week?

A
  • R + L maxillary facial processes - R + L mandibular facial processes
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13
Q

______ ______ _____ is the place where the upper maxillary and lower mandibular processes meet at either side of the stomodeum

A

commissura labiorum oris

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14
Q

What does the branchial cleft I between the mandibular process and arch II become?

A

external auditory meatus

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15
Q

The 2 _____ ______ ______ replaces the cadiac plate as the lower boundary of the stomodeum during the 4th week

A

mandibular facial processes

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16
Q

The 2 _____ ______ _____ become the posteriolateral boundaries of the stomodeum

A

maxillary facial processes

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17
Q

2 ____ _____ appear within the frontal prominence during the 4th week

A

nasal pits

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18
Q

After appearance of nasal pits, the frontal prominence becomes what three processes?

A
  1. median nasal facial process 2. R + L lateral nasal facial processes
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19
Q

Nasal pits deepen and become _____ _____ that open into the ______. The ducts become nostrils that open into _______ ____ during formation of nasal and oral cavities

A

nasal ducts stomodeum nasal cavities

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20
Q

___ facial processes become the face

A

7 (3 from frontal prominence_ (4 from branchial arch I)

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21
Q

What does the median nasal process become?

A

midline of nose philtrum of upper lip

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22
Q

What does the lateral nasal process become?

A

lateral sides and ala of nose infraorbital part of face

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23
Q

Median and lateral nasal facial processes arose from what structure that was present in the 3rd week IU?

A

frontal prominence

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24
Q

What does the maxillary process become?

A

upper part of cheeks lateral parts of upper lip

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25
Q

What does the mandibular process become?

A

lower part of cheeks lower lip chin

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26
Q

Maxillary and mandibular processes arose from what basic structures?

A

Arch 1

27
Q

Each arch 1 becomes __ facial processes: __ maxillary, __ mandibular

A

4 2 2

28
Q

Each cleft I becomes the ______ ______ ____

A

external auditory meatus

29
Q

Each Arch II becomes an embryonic fold of tissue called _____

A

operculum (cover)

30
Q

The operculum covers arches ____ and ____ and clefts ___, ___, ___

A
  • III, IV - II, III, IV
31
Q

The operculum becomes the sides of ______ below external auditory meatus

A

neck

32
Q

The maxillary facial process merges with the ____ ____ _____ process by the 5th embryonic week

A

median nasal facial

33
Q

Failure of the maxillary facial process to merge with the median nasal facial process by the 5th embryonic week results in what conditions?

A

unilateral or bilateral clefting of the upper lip

34
Q

If the mandibular processes do not merge with each other by the 5th embryonic week what occurs?

A

clefting of the lower jaw

35
Q

____ takes place between facial processes during facial fromation

A

merging

36
Q

The upper lip is formed by what 3 facial processes?

A

Right maxillary median nasal left maxillary

37
Q

The lower lip is formed by what 2 facial processes?

A

right mandibular left mandibular

38
Q

The frontal prominence after the nasal pits appear become the right and left _____ _____ ____ processes and the ______ _____ _____ process

A

lateral nasal facial median nasal facial

39
Q

The cardiac plate is replaced by the ______ _______ process during the 4th week IU as the inferior boundary of the stomeodeum

A

mandibular facial

40
Q

The ______ _____ ruptures allowing opening to the foregut that becomes the nasal and oral pharynx

A

buccopharyngeal membrane

41
Q

The buccopharyngeal membrane is the site of the anterior ____ of _____

A

pillar of facues

42
Q

The tongue forms during the ____ embryonic week as ____ lingual swellings along the ventral, inside surface of mandibular process of branchial arch I, II, and III.

A

4th 4

43
Q

During the 4th week the buccopharyngeal membrane ruptures and the 4 lingual swellings merge to become the ____

A

tongue

44
Q

______ _____ and 2 _____ _____ swellings become the anterior 2/3rd of tongue

A

Tuberculum impar Lateral lingual

45
Q

_____ becomes the posterior 1/3 or root of tongue

A

Copula

46
Q

The stomodeum will begin to be partitioned into oral and nasal cavities following the ___ embryonic week

A

6th

47
Q

Formation of the palate and oral cavity occurs btw weeks ___ - __

A

5-8

48
Q

The ____ ____ arises from inner surface of median nasal facial process

A

primary palate

49
Q

The _____ ______ arises from the primary palate

A

nasal septum

50
Q

The _____ ____ arise from inner surface of maxillary facial processes

A

palatine folds

51
Q

The palatine folds or shelves have lining epithelium that is connected to an underlying mesenchymal tissue also called _______

A

ectomesenchyme (originates in ectoderm primary germ layer)

52
Q

The head in general is from what primary germ layer?

A

ectoderm

53
Q

Structures below the neck is generally from what primary germ layer?

A

mesoderm

54
Q

During the 5th embryonic week the palatine folds move from a vertical position to a _____ position above the tongue

A

horizontal

55
Q

The edges of the anterior palatine folds with the primary palate form what shape?

A

Y

56
Q

Palate epithelial fusion beings in the ____ embryonic week with the fusion of the primary palate with ______ _____

A

6th palatine folds

57
Q

Epithelial fusion of the palate progresses ______ with the epithelium of palatine folds fusing and with epithelium of the nasal septum

A

posterior

58
Q

Mesenchymal tissue remains in the confines of ______ ______ and ____ _____. This tissue breaks up ______ _____ and intermingles within structures

A

palatine folds nasal septum fused epithelium

59
Q

When _____ is gone and ________ union is completed the _____ palate is formed. _____ and ____ _____ are present

A

epithelium mesenchymal secondary

60
Q

Formation of the secondary palate means that _____ and _____ _____ are present

A

oral cavities nasal cavities

61
Q

Epithelial fusion and mesenchymal union occurs btw weeks __ and ___ IU

A

6 to 8 wks

62
Q

The arms of Y is fusion and union of site of anterior ends of palatine folds with _____ ____

A

primary palate

63
Q

The stem of Y is fusion and union of palatine folds with _____ ____ and above with ___ _____

A

each other nasal septum

64
Q
A

Oral Histology (16 decks)

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