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3RD year > ORalHisto Quiz3 > Flashcards

ORalHisto Quiz3 Flashcards

1
Q

when does the face and other tissues start to form

A

4th week (embryonic period)

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2
Q

facial development includes the formations of:

A

primitive mouth (stomodeum)
mandibular arch
maxillary process
frontonasal process
nose

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3
Q

what week is fetal period

A

4-12th week

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4
Q

the first event in the development of the face (4th week prenatal)

A

disintegration of the membrane

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5
Q

what week does the primitive mouth increase in depth and enlarges

A

4th week

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6
Q

most facial structures develops through

A

fusion

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7
Q

initially located between these adjacent swellings due to proliferation, differentiation and morphogenesis

A

cleft/furrow

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8
Q

where is growth initially most rapid

A

upper face (to keep up with the development of the brain)

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9
Q

forehead ceases to grow at what age

A

12

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10
Q

the stomodeum is limited in depth by the?

A

oropharyngeal membrane

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11
Q

what is the temporary structure that separates the stomodeum from the primitive pharynx

A

oropharyngeal membrane

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12
Q

stacked bilateral swellings of tissue inferior to the stomodeum

A

pharyngeal arches

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13
Q

how many pairs of pharyngeal arches

A

6

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14
Q

the pharyngeal arches is covered by?

A

ectoderm

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15
Q

the pharyngeal arches is lined by?

A

endoderm

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16
Q

what does the pharyngeal arches support

A

primitive pharynx

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17
Q

the primitive pharynx is cranial most part of the?

A

foregut

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18
Q

the primitive pharynx is caudal to the?

A

stomodeum

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19
Q

what separates the primitive pharynx from the stomodeum

A

buccopharyngeal membrane

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20
Q

series of mesodermal thickenings appear on the lateral wall

A

buccopharyngeal membrane

21
Q

2 bulges of tissue that appear inferior to the primitive mouth

A

mandibular process

22
Q

the mandibular process consists of:

A

mesenchyme (neural crest cells)

23
Q

the future mandible is formed from?

A

mandibular processes that fuse to form the mandibular arch

24
Q

seen at the midline surface of mature bony mandible

A

mandibular symphysis

25
Q

this indicates where the mandible is formed by fusion of right and left mandibular processes

A

mandibular symphysis

26
Q

the mandibular arch is also considered as?

A

1st branchial arch

27
Q

forms within each side of the arch

A

Meckel’s cartilage

28
Q

what is it called when most of the cartilage disappears as the mandible is formed

A

intramembranous ossification

29
Q

the mandibular arch gives rise to?

A

lower face (including lower lip)
mandibular teeth
muscles of mastication
tongue

30
Q

bulge of tissue in the upper facial area

A

frontonasal process

31
Q

this process is at the most cephalic end of the embryo

A

frontonasal process

32
Q

the cranial boundary of the stomodeum

A

frontonasal process

33
Q

the frontonasal process gives rise to?

A

upper face
forehead
nose bridge
primary palate
nasal septum
medial nasal process

34
Q

rounded areas of specialized, thickened ectoderm found at the location of the developing special sense organs

A

placodes

35
Q

placodes that are located anterior of the frontonasal process

A

nasal placodes

36
Q

button-like that later develop into olfactory epithelium

A

nasal placodes

37
Q

initially located fishlike on each side of the frontonasal process

A

lens placodes

38
Q

when placodes submerge, they form a depression in the center of each placode and becomes?

A

nasal pit (future nasal cavity)

39
Q

2 crescent-shaped swellings located between the nasal pits

A

median nasal process

40
Q

when the median nasal processes fuse together externally, it forms the?

A

root to apex of the nose
tubercle of the upper lip
philtrum

41
Q

what does the 2 medial nasal processes form when they fuse internally

A

intermaxillary segment

42
Q

involved in the formation of maxillary incisors, primary palate, and nasal septum

A

intermaxillary segment

43
Q

outer part of the nasal pits

A

lateral nasal processes

44
Q

the lateral nasal processes forms the?

A

ala of the nose

45
Q

adjacent swellings on each side of the stomodeum following the increased growth of the mandibular arch

A

maxillary processes

46
Q

true or false:
most processes are formed from mesenchyme provided by the neural crest cells

A

true

47
Q

this process will form the midface, sides of upper lip, cheeks, secondary palate, posterior part of the maxilla, canine, posterior teeth, and associated tissue

A

maxillary processes

48
Q

fusion of both maxillary processes externally

A

upper lip

49
Q

the part where upper lip and lower lip meet

A

labial commissure

3RD year (7 decks)

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