WK4 Craniofacial

Question 1

branchial arches

Answer 1

Transient, complex, paired structures in the embryo pharynx which are homologous to gill arches in fish. Also, pharyngeal arches

Question 2

branchial cleft

Answer 2

The external depression between branchial arches, covered in ectoderm

Question 3

branchial pouch

Answer 3

The endodermal diverticulae between arches, matching the clefts

Question 4

maxilla

Answer 4

The upper jaw

Question 5

mandible

Answer 5

The lower jaw

Question 6

branchial arch arteries

Answer 6

The embryonic arteries which carry blood from the heart outflow tract dorsal through the branchial arches

Question 7

cranial nerve

Answer 7

Paired nerves extending from the ventral brain

Question 8

external auditory meatus

Answer 8

External ear canal

Question 9

lateral cervical sinus

Answer 9

A transient embryonic vesicle arising from branchial clefts 2 to 4

Question 10

thyroglossal duct

Answer 10

The path that the thyroid descends from the base of the tongue to the throat.

Question 11

foramen cecum

Answer 11

The pit left in the base of the tongue by the descending thryoid

Question 12

philtrum

Answer 12

The medial indentation in the upper lip

Question 13

hyoid

Answer 13

A bone in the neck supporting the tongue

Question 14

primary palate

Answer 14

The portion of the palate carrying the upper incisors

Question 15

secondary palate

Answer 15

The remainder of the palate

Question 16

oronasal cavity

Answer 16

The embryonic combined oral and nasal cavity before its division by the palate

Question 17

muscles of mastication

Answer 17

The muscles that move the jaws

Question 18

fontanelles

Answer 18

The large gaps between skull bone plates in an infant

Question 19

lingual

Answer 19

Having to do with the tongue

Question 20

craniosynostosis

Answer 20

An abnormally early fusion of the skull bone plates