Head and neck dev Flashcards Preview

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Flashcards in Head and neck dev Deck (42):
1

membrane that will become mouth

oropharyngeal membrane

2

ant. space similar to proctodeum

stomatodeum

3

cause of dev. of frontonasal prominence

proliferation of mesoderm and neural crest cells

4

organs derived by mesoderm and neural crest cells

mesoderm- skeletal muscle and epithelial cells
crest cells- bone and connective tissue of face and ganglia of head and neck

5

number of arches back from prominence

6

6

contents of each arch (4)

1. artery
2. cartilege
3. muscle
4. cranial nerve

7

portions that dev into face and palate

frontonasal prominence and 1st arch

8

divisions of 1st arch

maxiallary and mandibular prominences

9

pit in between all the prominences

stomatodeum

10

what will become the nose

olfactory placodes>olfactory pits

11

what is formed from mandibular prom

jaw

12

what creates primary palate

medial nasal prominence

13

separation between lat nasal and max prominence

nasolacrimal groove > nasolacrimal duct

14

derivatives of frontonasal prominence

forehead, nasal bridge, nasal sept

15

derivatives of medial nasal prom

primary palate, philtrum of upper lip, tip of nasal septum

16

derivatives of lat nasal prom

ala of nose

17

derivatives of max prom

maxilla and lat upper lip

18

derivatives of mandibular priom

jaw and lower lip

19

prob with medial nasal and max fusion

cleft lip

20

prob with max and mandibular fusion

macrostomia

21

prob with lat nasal and max fusion

oblique facial cleft

22

2 sources of palate

1. medial nasal - promiary palate (ant.)
2. palatal process of maxilla - post palate including soft

23

arch # and corresponding cranial nerve

1 - 5
2 - 7
3 - 9
4 - 10

24

prominences developed by trigeminal

V1 - frontonasal
V2 - maxiallary
V3 - mandibular

25

external and internal division of arches

external - pharyngeal grooves
internal - pharyngeal pouch

26

fate of 4 pharyngeal grooves

1. becomes auditory meatus
2-4. covered by caudal drift of 2nd arch to become cervical sinuses

27

fate of 4 pharyngeal pouches

1. middle ear chamber and auditory tube
2. palatine fossa
3. ventral - thymus, dorsal - inf parathyroid glands
4. dorsal - sup parathyroid glands, ventral become calcitonin secreting aspect of thyroid

28

tissues creating tympanic membrane

ectoderm of 1st pharyngeal groove meeting endoderm of 1st pharyngeal pouch

29

fate if cartilage of 4 arches

1. Meckle's - mandible, sphenomandibular ligament, malleus, incus
2. Reicherts - stapes, styloid process, lesser horn of hyoid
3. greater horn of hyoid
4. laryngeal cartiledges

30

muscles of 4 arches

1. muscles of mastication, mylohyoid, anterior digastric, tensor tympani, tensor palatini
2. muscles of facial expresion, posterior digastric, stylohyoid, stapedius
3. stylopharyngeus
4. levator palatini, muscles of pharynx and larynx

31

arteries of the 4 arches

1. none
2. none
3. common carotids and proximal internal carotid
4. left- aortic arch, right - subclavian
5. none
6. pulmonary arteries

32

point of origin of thyroid

b/w 1 and 2 arches

33

point of dev of pit cland (2)

ant. - ectoderm in roof of stomatodeum
post - outgrowth of neuroectoderm of neural tune near hypothalamus

34

arches where tongue develops from

ant 2/3 - 1st arch (trigeminal)
post 2/3 - 3 and 4 (glosso and vagus)
skeletal muscle from somites

35

arteries of the 4 arches

1. none
2. none
3. common carotids and proximal internal carotid
4. left- aortic arch, right - subclavian
5. none
6. pulmonary arteries

36

point of origin of thyroid

b/w 1 and 2 arches

37

point of dev of pit cland (2)

ant. - ectoderm in roof of stomatodeum
post - outgrowth of neuroectoderm of neural tune near hypothalamus

38

arches where tongue develops from

ant 2/3 - 1st arch (trigeminal)
post 2/3 - 3 and 4 (glosso and vagus)
skeletal muscle from somites

39

tissue source for thyroid

endoderm b/w arches

40

which pouch becomes ant. pit

rathkes pouch (ectoderm)

41

time thyroid reaches final position

7th week

42

passage through which thyroid descends

thyroglossal duct (midline)

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