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Oral Bio > Pharyngeal Arches I > Flashcards

Pharyngeal Arches I Flashcards

1
Q

Roughly when does the formation of pharyngeal system stop?

A

5.5 Weeks

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2
Q

Fistula

A

abnormal connection between 2 things

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3
Q

When does pharangeal arch formation occur?

A

about the same time of the closing of the neural tube

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4
Q

The 1st Pharyngeal arch is split into two parts what are they?

A

Mandibular prominence and Maxillary Prominence

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5
Q

T or F

The arches contain all 3 layers (ecto/meso/endoderms)

A

True

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6
Q

What is the space called inbetween the arches on the ectoderm side?

A

Pharyngeal Cleft

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7
Q

What is the space called in between the arches on the endoderm side?

A

Pharyngeal pouch

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8
Q

What is the opening of the mouth called during development?

A

stomodeum

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9
Q

Aortic Arches arise from?

A

Mesoderm

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10
Q

Aortic Arches connect what?

A

Truncus arteriosus to the dorsal aorta

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11
Q

P. Arch I derives what muscles?

A

Muscles of Mastication

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12
Q

P. Arch II derives what muscles?

A

Muscles of Facial Expression

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13
Q

P. Arch III derives what muscles?

A

Stylophryngeus… thats it

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14
Q

P arch IV derives what muscles

A

Pharyngeal constrictors

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15
Q

P. Arch 5-6 Derives what muscles?

A

Laryngeal muscles

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16
Q

CN V comes from which arch?

A

Arch I

17
Q

CN VII comes from which arch?

A

Arch II

18
Q

CN IX comes from which arch?

A

Arch III

19
Q

CN X comes from which arch?

A

Arch IV

20
Q

Treacher Collins Syndrome is an issue in which arch?

A

Arch I

Mutation of Treacle gene

21
Q

What are the clefts lined with?

A

ectoderm

22
Q

Which cleft is the only cleft that is not obliterated in development?

A

Cleft 1

23
Q

What does Cleft 1 form?

A

External auditory meatus

24
Q

What aortic arches largely disappear?

A

1 and 2

Oral Bio (8 decks)

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