RSL - Repro - Aortic arch / branchial arch

Question 1

Aortic Arch Derivatives: 1st

Answer 1

Maxillary artery (1=max)

Question 2

Aortic Arch Derivatives: 2nd

Answer 2

Stapedial artery and hyoid artery (2 = S)

Question 3

Aortic Arch Derivatives: 3rd

Answer 3

Common carotid artery and proximal part of internal corototid artery (C is third letter)

Question 4

Aortic Arch Derivatives: 4th

Answer 4

Left: Aortic arch Right: proximal part of right subclavian (4 = 4 limbs)

Question 5

Aortic Arch Derivatives: 6th

Answer 5

Proximal part of pulmonary arteries Left: ductus arteriosus

Question 6

Origin / location: Branchial cleft

Answer 6

Ectoderm (outside)

Question 7

Origin / location: branchial arch

Answer 7

Medoserm (middle)

Question 8

Origin / location: Branchial pouch

Answer 8

Endoderm (inner)

Question 9

Branchial cleft derivatives: 1st

Answer 9

External auditory meatus

Question 10

Branchial cleft derivatives: 2nd

Answer 10

temporary cervical sinus, obliterated by 2nd arch mesochyme

Question 11

Branchial cleft derivatives: 3rd

Answer 11

temporary cervical sinus, obliterated by 2nd arch mesochyme

Question 12

Branchial cleft derivatives: 4th

Answer 12

temporary cervical sinus, obliterated by 2nd arch mesochyme

Question 13

Branchial Arch Derivatives:1st: (muscles)

Answer 13

Muscles of mastication, anterior belly of the digastric, mylohyoid, tensor tympani, tensor veli palatini

Question 14

Branchial Arch Derivatives:2nd: (muscles)

Answer 14

Muscles of facial expression, buccinator, platysma, stapedius, stylohyoid, posterior belly of the digastric, auricular[10]

Question 15

Branchial Arch Derivatives:3rd: (muscles)

Answer 15

Stylopharyngeus

Question 16

Branchial Arch Derivatives:4th: (muscles)

Answer 16

Cricothyroid muscle, all intrinsic muscles of soft palate (including levator veli palatini) except tensor veli palatini

Question 17

Branchial Arch Derivatives:6th: (muscles)

Answer 17

All intrinsic muscles of larynx except the cricothyroid muscle

Question 18

Branchial Arch Derivatives:1st: Skeletal contributions

Answer 18

Premaxilla, maxilla, mandible (only as a model for mandible not actual formation of mandible), zygomatic bone, part of the temporal bone, the incus, and the malleus of the middle ear, also Meckel’s cartilage and the sphenomandibular ligament.

Question 19

Branchial Arch Derivatives:2nd: Skeletal contributions

Answer 19

Stapes, temporal styloid process, hyoid (lesser horn and upper part of body), stylohyoid ligament, Reichert’s cartilage

Question 20

Branchial Arch Derivatives:3rd: Skeletal contributions

Answer 20

Hyoid (greater horn and lower part of body), thymus, inferior parathyroids

Question 21

Branchial Arch Derivatives:4th: Skeletal contributions

Answer 21

Thyroid cartilage, superior parathyroids, epiglottic cartilage

Question 22

Branchial Arch Derivatives:6th: Skeletal contributions

Answer 22

Cricoid cartilage, arytenoid cartilages, corniculate cartilage, cuneiform cartilages

Question 23

Branchial Arch Derivatives:1st: Nerve

Answer 23

Trigeminal nerve (part of V2 and V3)

Question 24

Branchial Arch Derivatives:2nd: Nerve

Answer 24

Facial nerve (VII)

Question 25

Branchial Arch Derivatives:3rd: Nerve

Answer 25

Glossopharyngeal nerve (IX)

Question 26

Branchial Arch Derivatives:4th: Nerve

Answer 26

Vagus nerve (X), superior laryngeal nerve

Question 27

Branchial Arch Derivatives:6th: Nerve

Answer 27

Vagus nerve (X), recurrent laryngeal nerve

Question 28

Branchial Puch derivatives: 1st:

Answer 28

Middle ear cavity, eustachian tube, mastoid air cells

Question 29

Branchial Puch derivatives: 2nd

Answer 29

Epithelial lining of palatine tonisls

Question 30

Branchial Puch derivatives: 3rd

Answer 30

Dorsal wings: Inferior parathyroids

Ventral wings: Thymus

Question 31

Branchial Pouch derivatives: 4th

Answer 31

Dorsal wings: Superior parathyroids

Question 32

Cleft lip

Answer 32

Failure of maxillary and medial nasal prominance fusion

Question 33

Cleft palate

Answer 33

• Failure of two lateral palatine processes
• failure of lateral palatine process with nasal septum or medial palatine process