Aortic arch derivatives, branchial apparatus/cleft

Question 1

1st

Answer 1

part of maxillary artery (branch of external carotid)

Question 2

2nd

Answer 2

Stapedial artery and hyoid artery

Question 3

3rd

Answer 3

Common carotid artery and proximal part of internal carotid artery

Question 4

4th

Answer 4

On left: aortic arch

On right: proximal part of right subclavian artery

Question 5

6th

Answer 5

Proximal part of pulmonary arteries and ductus arteriosus (on left)

Question 6

Brachial cleft derivation

Answer 6

Ectoderm (CAP covers outside to in)
Cleft-ectoderm
Arches-mesoderm
Pouches-endoderm

Question 7

Branchial arch derivation

Answer 7

Mesoderm (muscles and arteries) and neural crest (bones and cartilage)

Question 8

Branchial pouches

Answer 8

Endoderm

Question 9

1st branchial cleft

Answer 9

External auditory meatus

Question 10

2nd-4th clefts

Answer 10

Tempory cervical sinuses, obliterated by proliferation of 2nd arch mesenchyme

Question 11

Persistent cervical sinus

Answer 11

Branchial cleft cyst within lateral neck