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Anatomy > Pharyngeal arch > Flashcards

Pharyngeal arch Flashcards

1
Q

What type of pouches grow from the pharynx?

A

Endodermal pouch

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2
Q

What forms a pharyngeal arch?

A

Mesodermal swelling

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3
Q

From which germ layer are pharyngeal arches formed?

A

Mesoderm

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4
Q

How do endodermal pouches cause pharyngeal arches?

A

Endodermal pouches grow out of th redeveloping pharynx towards the epidermis, this pushes against the mesoderm which swells forming a pharyngeal arch

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5
Q

What CN enter pharyngeal arch I?

A

V2 and V3

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6
Q

What are the muscular derivatives of pharyngeal arch I?

A

Muscles of mastication, levator veli palatine, tensor veli palatine, anterior digastric, mylohyoid

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7
Q

What CN enter pharyngeal arch II?

A

VII

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8
Q

What are the muscular derivatives of pharyngeal arch II?

A

Muscles of facial expression, posterior digastric, stylohyoid and stapedius

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9
Q

What nerve connects pharyngeal arch I and II?

A

Chorda tympani

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10
Q

What CN enters pharyngeal arch III?

A

IX

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11
Q

What are the muscular derivatives of pharyngeal arch III?

A

Stylopharyngeus

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12
Q

What CN enters pharyngeal arch IV/VI?

A

X and XI

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13
Q

What are the muscular derivatives of pharyngeal arch IV?

A

Muscles of pharynx larynx and soft palate

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14
Q

Which pharyngeal arch does V innervate?

A

I

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15
Q

Which pharyngeal arch does VII innervate?

A

II

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16
Q

Which pharyngeal arch does IX innervate?

A

III

17
Q

Which pharyngeal arch does X innervate?

A

IV

18
Q

Which pharyngeal arch does XI innervate?

A

VI

19
Q

From which pharyngeal arch is the pharynx, larynx and soft palate derived?

A

IV/VI

20
Q

From which pharyngeal arch is the muscles of mastication derived?

A

I

21
Q

From which pharyngeal arch is mylohyoid, anterior digastric, levator veli palatine and tensor veli palatine derived?

A

I

22
Q

From which pharyngeal arch are muscles of facial expression derived?

A

II

23
Q

From which pharyngeal arch is stapedius derived?

A

II

24
Q

What are the skeletal derivatives of pharyngeal arch I?

A

Maxillary and mandibular processes and malleus and incus

25
Q

What are the skeletal derivatives of pharyngeal arch II?

A

Stapes, upper part of body of hyoid, lesser Cornu of hyoid, styloid process, stylohyoid ligament

26
Q

What are the skeletal derivatives of pharyngeal arch III?

A

Greater Cornu of hyoid, lower part of body of hyoid

27
Q

What are the skeletal derivatives of pharyngeal arch IV?

A

Cartilage of larynx

28
Q

What are the derivatives of pouch 1?

A

Tubotympanic recess, external auditory meatus (middle ear)

29
Q

What are the derivatives of pouch 2?

A

Palatine tonsil

30
Q

What are the derivatives of pouch 3?

A

Inferior parathyroid gland

31
Q

What are the derivatives of pouch 4?

A

Superior parathyroid gland and C cells of thyroid gland

Anatomy (40 decks)

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