Branchial arch skeletal, muscle, nervees, and other derivatives (dave's notes)

Question 1

What are the skeletal derivatives of the first branchial arch?

Answer 1

Mandible and maxilla

Question 2

What are the skeletal derivatives of the second branchial arch?

Answer 2

Stapes, styloid process, stylohyoid ligament, lesser horn and upper body of hyoid

Question 3

What are the skeletal derivatives of the third branchial arch?

Answer 3

Greater horn and caudal part of the body of the hyoid

Question 4

What are the skeletal derivatives of the 4th, 5th, and 6th branchial arches?

Answer 4

Thyroid, cricoid, epiglottic and arytenoid cartilages

Question 5

What are the muscles of the first branchial arch?

Answer 5

Muscles of mastication, mylohyoid, anterior belly of digastric and tensor muscles

Question 6

What are the muscles of the second branchial arch?

Answer 6

Muscles of fascial expression, stapedius stylohyoid, posterior belly of digastric

Question 7

What are the muscles of the third branchial arch?

Answer 7

Stylopharyngeus

Question 8

What are the muscles of the 4th, 5th and 6th branchial arches?

Answer 8

Intrinsic muscles of the larynx, muscles of the pharynx, levator palati

Question 9

What is the nerve of the first branchial arch?

Answer 9

Mandibular nerve

Question 10

What is the nerve of the second branchial arch?

Answer 10

Facial nerve

Question 11

What is the nerve of the third branchial arch?

Answer 11

Glossopharyngeal nerve

Question 12

What is the nerve of the 4th, 5th, and 6th branchial arches?

Answer 12

Laryngeal and pharyngeal branches of the vagus

Question 13

What does the endoderm of the first branchial arch develop into?

Answer 13

Middle ear and mastoid antrum

Question 14

What does the dorsal diverticulum of the second branchial arch develop into?

Answer 14

The formation of the tympanic cavity

Question 15

What does the external branchial groove of the first branchial arch become?

Answer 15

The external acoustic meatus

Question 16

What does the ventral development of the second branchial arch become?

Answer 16

The tonsillar crypts and supratonsillar fossa )GPn and Fn)

Question 17

What does external surface of the third branchial arch become?

Answer 17

The thymic rudiment becomes the thymus gland

Question 18

What does the ventral surface of the fourth pouch become?

Answer 18

The pouch is attached to the thyroid, preventing descent of the fourth parathyroid glands (the superior parathyroids in the adult)

Question 19

What does the dorsal surface of the fourth pouch become?

Answer 19

the superior parathyroid gland