Embryology

Question 1

1st arch artery

Answer 1

Maxillary

Question 2

2nd arch artery

Answer 2

Stapedial

Question 3

3rd arch artery

Answer 3

CCA, ICA

Question 4

4th arch artery

Answer 4

Aortic arch, right subclavian, brachiocephalic

Question 5

6th arch artery

Answer 5

Ductus arteriosus, roots of pulmonary

Question 6

1st arch muscles

Answer 6

Masticators (temporali, masseter, pterygoids), mylohyoid, anterior belly of digastric, tensor tympani, tensor veli palatini

Question 7

2nd arch muscles

Answer 7

Stapedius, stylohyoid, muscles of facial expression, posterior belly of digastric

Question 8

3rd arch muscles

Answer 8

Stylopharyngeus, superior and middle constrictors

Question 9

4th arch muscles

Answer 9

Cricothyroid, levator veli palatini and other intrinsic muscles of the soft palate

Question 10

6th arch muscles

Answer 10

Intrinsic muscles of the larynx except cricothyroid

Question 11

1st arch skeletal elements

Answer 11

Meckel cartilage: mandible, malleus head and neck, incus body and short process, anterior malleal ligament

Question 12

2nd arch skeletal elements

Answer 12

Reichert cartilage: manubrium of malleus, long and lenticular process of incus, stapes superstructure, styloid process, stylohyoid ligament, lesser horns of hyoid

Question 13

3rd arch skeletal elements

Answer 13

Greater horns and lower body of hyoid

Question 14

4th arch skeletal elements

Answer 14

Thyroid and cuneiform cartilages

Question 15

6th arch skeletal elements

Answer 15

Arytenoid, cricoid and corniculate cartilages

Question 16

5 ethmoturbinales

Answer 16

1. Uncinate and agger nasi
2. Middle turbinate
3. Superior turbinate
   4+5. Supreme turbinate

Question 17

4 ethmoid lamellae

Answer 17

1. Uncinate
2. Ethmoid bulla
3. Ground lamella
4. Lamella of the superior turbinate