1e.Aortic arch derivative-Branchial apparatus-Branchial cleft derivatives-Branchial arch derivatives-Branchial pouch derivatives-Cleft lip and cleft palate Flashcards Preview

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Flashcards in 1e.Aortic arch derivative-Branchial apparatus-Branchial cleft derivatives-Branchial arch derivatives-Branchial pouch derivatives-Cleft lip and cleft palate Deck (59)
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1

Embryologically, the first aortic arch gives rise to part of what artery?

The maxillary artery, which is a branch of the external carotid artery (the first arch is maximal)

2

Embryologically, the second aortic arch gives rise to what two arteries?

The stapedial artery and the hyoid artery (Second = Stapedial)

3

Embryologically, the third aortic arch gives rise to which two arteries?

The Common Carotid and proximal internal Carotid (C is third letter of alphabet)

4

Embryologically, the fourth aortic arch on the left gives rise to what structure?

The aortic arch (4th arch [4 limbs] = systemic)

5

Embryologically, the fourth aortic arch on the right gives rise to what structure?

The proximal part of right subclavian artery (4th arch [4 limbs] = systemic)

6

Embryologically, the fifth aortic arch gives rise to which structures?

There is no fifth arch

7

Embryologically, the sixth aortic arch gives rise to what structure on both the right and the left?

Proximal part of the pulmonary arteries

8

Embryologically, the sixth aortic arch gives rise to the ____ ____ on the left side only.

Ductus arteriosus

9

Aortic arch derivatives develop into the ____ (arterial/venous) system.

Arterial

10

Embryologically, what are the three components of the branchial (pharyngeal) apparatus?

Clefts, arches, and pouches

11

Embryologically, branchial clefts (also called branchial grooves) are derived from what primary germ layer?

The ectoderm

12

Embryologically, branchial arches are derived from which two cell populations?

The mesoderm and the neural crest

13

A man has difficulty swallowing due to malformation of a pharyngeal muscle. Which embryologic tissue is likely involved?

Muscles and arteries of the branchial arches develop from mesoderm

14

A patient presents with a malformed hyoid bone, which is part of the pharyngeal apparatus. Which embryologic tissue is likely involved?

Neural crest cells form bones and cartilage of the branchial arches

15

Embryologically, branchial pouches are derived from what primary germ layer?

The endoderm

16

What are the branchial apparatus components from outside to inside?

Clefts, Arches, Pouches (CAP covers outside to inside)

17

A patient has trouble with hearing. Which branchial cleft is most likely to be involved?

The external auditory meatus is derived from the first branchial cleft—malformations would result in problems with hearing

18

The second to fourth branchial clefts develop into temporary ____, which are later obliterated by proliferation of second arch mesenchyme.

Cervical sinuses

19

A patient is suspected as having a branchial cleft cyst. Where would you expect to find it on imaging?

On the lateral aspect of the neck, as it arises from a persistent cervical sinus

20

Embryologically, the thyroid, cricoid, arytenoids, cuneiform, and corniculate cartilages are derived from which branchial arches?

The fourth and sixth branchial arches—the fifth branchial arch makes no major developmental contributions

21

A patient has difficulty chewing due to a problem with her mandible. Which branchial arch is likely involved?

Meckel cartilage, including the Mandible, is derived from the first branchial arch

22

Embryologically, the cartilaginous derivatives from the second branchial arch are called what?

Reichert cartilage (Smile), which includes Stapes, Stylohyoid ligament, Styloid process, and lesser horn of hyoid

23

Embryologically, the third branchial arch is innervated by which cranial nerve?

Cranial nerve IX (pharynx) (Stylopharyngeus: Swallow stylishly)

24

Embryologically, the styloid process is derived from which branchial arch?

The second branchial arch

25

Embryologically, the greater horn of the hyoid derives from branchial arch #____, and the lesser horn derives from branchial arch #____.

3, 2

26

Embryologically, the stylohyoid muscle derives from branchial arch #____; the stylopharyngeus muscle derives from branchial arch #____.

2, 3

27

Which cartilages are derived from the fourth and sixth branchial arches?

Thyroid, cricoid, arytenoid, corniculates, cuneiform

28

Embryologically, the mylohyoid is derived from which branchial arch?

The first branchial arch

29

What is the pathophysiology behind a congenital pharyngocutaneous fistula?

The persistence of a cleft and pouch creating a fistula between the tonsillar area and a cleft in the lateral neck

30

Embryologically, most pharyngeal constrictor muscles are derived from which branchial arch?

The fourth branchial arch

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