pharyngeal arches Flashcards

1
Q

2 types of union

A

merging

fusion

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2
Q

stomodeum

A

oral pit, becomes the mough

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3
Q

structures from frontal process

A

forehead
middle nose
upper lip and dental arch

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4
Q

structures from maxillary process of mandibular arch (1)

A
cheeck
upper lip
maxillary
zygomatic
part of temporal
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5
Q

structures from mandibular process of mandibular arch (1)

A

mandible

lower jaw

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6
Q

dimple formation

A

meeting of the 2 mandibular processes

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7
Q

buccopharyngeal membrane

A

covering of stomodeum

where ectoderm meets endoderm

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8
Q

nasal placodes

A

thickened epithelium on frontal process

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9
Q

nasal pit

A

future nostril, in the center of nasal placode

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10
Q

nasomedial process forms

A

upper lip and jaw with the maxillary process

primary palate

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11
Q

nasolateral process forms

A

sides and wings of nose

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12
Q

nasolacrimal groove

A

between the nasolateral process and maxillary process

closes to form the lacrimal duct

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13
Q

intermaxillary segment forms

A

formed from the merging of the nasomedial segments

forms the middle of nose, philtrum of upper lip, dental arch, and primary palate

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14
Q

mandibular process forms

A

lower lip and jaw

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15
Q

maxillary process

A

upper lip and jaw with nasomedial process

palatal shelves–> secondary palates

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16
Q

cleft lip

A

failure of fusion between the nasomedial process and maxillary process

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17
Q

macrostomia

A

failure of the maxillary and mandibular processes to fuse

mouth is large

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18
Q

microstomia

A

over fusion of maxillary and mandibular processes

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19
Q

frontaonasal dysplasia

A

underdevelopment of frontal prominence

bifid nose and wideset eyes

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20
Q

oblique facial cleft

A

failure of nasolateral process and maxillary processes to join

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21
Q

what becomes ears

A

bumps between the hyoid arch (3) and mandibular process (part of 2)

22
Q

pharyngeal cleft

A

grooves on outside between arches

23
Q

pharyngeal pouch

A

groove on inside between arches

24
Q

cleft 1 becomes

A

external auditory meatus

25
Q

cleft 2-4

A

fuse to become cervical sinus

26
Q

cervical/branchial cysts

A

failure of the cervical sinus to disappear

always latearl

27
Q

pharyngeal clefts are

A

ectoderm

28
Q

pharyngeal pouches are

A

endoderm

29
Q

pouch 1

A

auditory tube and middle ear cavity

30
Q

pouch 2

A

palatine tonsil

31
Q

pouch 3

A

lower parathyroid glands and thymus

32
Q

pouch 4

A

superior parathyroid glands and ultimobranchial body

33
Q

ultimobranchial body

A

becomes parafollicle cells in thyroid

34
Q

where does thyroid come from

A

foramen cecum migrates down

35
Q

throglossal cysts

A

thyroid remnants from the migration of the foramen cecum to become the thyroid
always at midline

36
Q

mandibular hyperplasia

A

mandible underdevelopment

deformed ears

37
Q

incisive foramen

A

midline where primary and secondary palates meet

38
Q

cleft palate

A

failure of palates to fuse, can be primary or secondary, unilateral or bilateral

39
Q

anterior 2/3 of tongue is from

A

first arch
2 lateral lingual swellings
tuberculum impar

40
Q

posteiror 1/3 of tongue and root is from

A

arches 3 and 4

41
Q

tongue muscles are from

A

occipital somites

42
Q

ankloglossia

A

frenulum extends to tongue tip

43
Q

microglossia

A

tongue is too small

44
Q

macroglossia

A

tongue is too big

45
Q

bifid tongue

A

incomplete fusion of lateral lingual swellings

46
Q

frenectomy

A

cut frenulum

47
Q

taste sensation CN

A

VII, IX, X

48
Q

muscles from branchial arches innervation

A

V, VII, IX, X, XI

49
Q

muscles from occipital somites innervation

A

III, IV, VI, XII

50
Q

parasympathetic CN

A

III, VII, IX, X

51
Q

tongue innervation

A

V, VII, IX, X, XII