Embryology of the Head & Neck Flashcards Preview

Unit 3: Embryology JC > Embryology of the Head & Neck > Flashcards

Flashcards in Embryology of the Head & Neck Deck (85)
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1

Stomodeum gives rise to the ____.

mouth

2

Frontal nasal prominence gives rise to the ____.

nose

3

How many pairs of pharyngeal arches form?

5

4

1st pharyngeal arch has 2 sub units: ____ and ____.

maxillary and mandibular prominences

5

Formation of pharyngeal arches is driven by proliferation and migration of ____.

neural crest cells

6

Pharyngeal arches are covered by ____. lined by ____, with a core made up of ____.

ectoderm, endoderm, mesenchyme

7

1st pharyngeal arch is innervated by ____.

CN V - Trigeminal

8

2nd pharyngeal arch is innervated by ____.

CN VII - Facial

9

3rd pharyngeal arch is innervated by ____.

CN IX - Glossopharyngeal

10

4th & 6th pharyngeal arches are innervated by ____.

CN X - Vagus

11

The 1st pharyngeal arch differs from the others, in that it is lined predominantly by ____.

ectoderm

12

Pharyngeal ____ separate the arches from the outside.

grooves

13

Pharyngeal ____ separate the arches from the inside.

pouches

14

The ____ is where the ectoderm and endoderm come together at the grooves/pouches.

pharyngeal membrane

15

neural crest derivatives of arch 1 - maxillary prominence

facial bones (maxillary, zygomatic, squamous portion of temporal)

16

neural crest derivatives of arch 1 - mandibular prominence

Meckel's Cartilage - mandible, inner ear bones (incus & malleus), anterior ligament of malleus

17

neural crest derivatives of arch 2

Reichart Cartilage - lesser cornu of hyoid (superior), stylohyoid ligament, styloid process, stapes

18

neural crest derivatives of arch 3

body & greater cornu of hyoid (inferior)

19

neural crest derivatives of arch 4/6

thyroid & cricoid cartilage

20

mesoderm derivatives of arch 1

muscles of mastication (temporalis, masseter, mylohyoid, ant. digastric, tensor tympani)

21

mesoderm derivatives of arch 2

muscles of facial expression (buccinator, orbicularis oris, frontalis, etc), stylohyoid, & post. digastric

22

mesoderm derivatives of arch 3

stylopharyngeus

23

mesoderm derivatives of arch 4/6

pharyngeal constrictors, m. of soft palate, & m. of larynx

24

sensory innervation of arch 1

CN V - somatosensation of face, teeth, palate, and ant. 2/3 of tongue

25

sensory innervation of arch 2

CN VII - taste to ant. 2/3 of tongue

26

sensory innervation of arch 3

CN IX - taste and somatosensory to post. 1/3 of tongue

27

sensory innervation of arch 4/6

CN X - taste and somatosensory to pharynx, larynx & esophagus

28

endoderm derivative of pharyngeal pouch 1

middle ear cavity & auditory tube

29

endoderm derivative of pharyngeal pouch 2

palatine tonsils

30

endoderm derivative of pharyngeal pouch 3

inferior parathyroid glands & thymus