Pharyngeal Arches I Flashcards Preview

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Flashcards in Pharyngeal Arches I Deck (24):
1

Roughly when does the formation of pharyngeal system stop?

5.5 Weeks

2

Fistula

abnormal connection between 2 things

3

When does pharangeal arch formation occur?

about the same time of the closing of the neural tube

4

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

Mandibular prominence and Maxillary Prominence

5

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

True

6

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

Pharyngeal Cleft

7

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

Pharyngeal pouch

8

What is the opening of the mouth called during development?

stomodeum

9

Aortic Arches arise from?

Mesoderm

10

Aortic Arches connect what?

Truncus arteriosus to the dorsal aorta

11

P. Arch I derives what muscles?

Muscles of Mastication

12

P. Arch II derives what muscles?

Muscles of Facial Expression

13

P. Arch III derives what muscles?

Stylophryngeus... thats it

14

P arch IV derives what muscles

Pharyngeal constrictors

15

P. Arch 5-6 Derives what muscles?

Laryngeal muscles

16

CN V comes from which arch?

Arch I

17

CN VII comes from which arch?

Arch II

18

CN IX comes from which arch?

Arch III

19

CN X comes from which arch?

Arch IV

20

Treacher Collins Syndrome is an issue in which arch?

Arch I
(Mutation of Treacle gene)

21

What are the clefts lined with?

ectoderm

22

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

Cleft 1

23

What does Cleft 1 form?

External auditory meatus

24

What aortic arches largely disappear?

1 and 2