Pharyngeal Arches

Question 1

What are the names of first two pharyngeal arches?

Answer 1

I - mandibular
II - hyoid

Question 2

What aortic arch artery is from arch 1?

Answer 2

maxillary artery

Question 3

What aortic arch artery is from arch 2?

Answer 3

hyoid artery
stapedial artery
- disappear later

Question 4

What aortic arch artery is from arch 3?

Answer 4

internal carotid artery

Question 5

What aortic arch artery is from arch 4?

Answer 5

right subclavian artery
aorta

Question 6

What is the cranial nerve for arch 2?

Answer 6

CN VII (facial)

Question 7

What is the cranial nerve for arch 1?

Answer 7

CN V (trigeminal)

Question 8

What is the cranial nerve for arch 3?

Answer 8

CN IX (glossopharyngeal)

Question 9

What is the cranial nerve for arch 4?

Answer 9

CN X (vagus)

Question 10

What are the branchiomeric muscles for arch 1?

Answer 10

• muscles of mastication
• tensor tympani
• mylohyoid
• tensor veli palatini
• anterior belly of digastric

Question 11

What are the branchiomeric muscles for arch 2?

Answer 11

• muscles of facial expression
• stapedius
• stylohyoid
• posterior belly of digastric

Question 12

What are the branchiomeric muscles for arch 3?

Answer 12

• stylopharngeus

Question 13

What are the branchiomeric muscles for arch 4?

Answer 13

• pharyngeal and laryngeal musculature

Question 14

What are the skeletal derivatives of arch 1?

Answer 14

• malleus
• incus
• sphenomandibular ligament
• Meckel’s cartilage
• tympanic ring

Question 15

What are the skeletal derivatives of arch 2?

Answer 15

• stapes
• styloid process
• stylohyoid ligament
• less horn of the hyoid
• part of the body of hyoid

Question 16

What are the skeletal derivatives of arch 3?

Answer 16

• greater horn of hyoid
• part of body of hyoid

Question 17

What are the skeletal derivatives of arch 4?

Answer 17

Laryngeal cartilages

Question 18

What is in the pharyngeal groove (1) of arch 1 and 2?

Answer 18

external auditory meatus
external ear

Question 19

What is in the pharyngeal groove between arches II, III, and IV?

Answer 19

cervical sinus (temporary)

Question 20

What is in the pharyngeal pouch 1?

Answer 20

middle ear
auditory tube

Question 21

What is in the pharyngeal pouch 2?

Answer 21

supratonsilar fossa

Question 22

What is in the pharyngeal pouch 3?

Answer 22

thymus
inferior parathyroid gland

Question 23

What is in the pharyngeal pouch 4?

Answer 23

superior parathyroid gland
post branchial body

Question 24

What are the two processes of the first (mandibular) arch?

Answer 24

maxillary and mandibular

Question 25

Which pharyngeal arches develop into facial and neck structures that can be observed externally?

Answer 25

1
2

Question 26

What is stern’s rule?

Answer 26

Question 27

What is the adult derivative of the 1st pharyngeal pouch?

Answer 27

• auditory (pharyngotympanic, eustachian) tube
• middle ear (tympanic cavity)
• part of the eardrum (tympanic membrane)

Question 28

What is the adult derivative of the 2nd pharyngeal pouch?

Answer 28

• tonsillar crypt

Question 29

What is the adult derivative of the 3rd pharyngeal pouch?

Answer 29

• inferior parathyroid glands
• thymus gland

Question 30

What is the adult derivative of the 4th pharyngeal pouch?

Answer 30

• superior parathyroid gland
• ultimobranchial body

Question 31

What is the adult derivative of the 5th pharyngeal pouch?

Answer 31

• ultimobranchial body