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Flashcards in pharyngeal arches Deck (48):
1

when do the pharyngeal arches form

4th week of development

2

What are the four parts of the pharyngeal arches ?

arch
pharyngeal pouch
clefts or groves on outside
membrane

3

A typical pharyngeal arch contains

artery
nerve
cartilage
muscular

4

What two prominences form the first arch

mandibular and maxillary prominences

5

what nerve is from the first arch

trigeminal CV nerve

6

what nerve is from the second arch

facial nerve CVII

7

third arch forms what nerve

glossopharyngeal nerve

8

what muscles are derived from the first arch

mylohyoid and anterior belly of the digastric and tensor tympani and tensor veli palatini

9

what muscles form from the second arch

stepedius and stylohyoid and posterior belly of digastric

10

what muscles form from the third arch

stylopharyngeus

11

the fourth and sixth arches give rise to

vagus nerve

12

what muscles are derived from fourth and six arches

laryngeal, pharyngeal, constrictors, levator veli palatini, skeletal muscle of esophagus

13

the fourth arch gives rise to what part of laryngeal muscles

cricothyroid (superior laryngeal nerve)

14

the 6th arch gives rise to

the rest of the laryngeal muscles (recurrent laryngeal nerve)

15

the malleus and incus are from what arch

first

16

the stapes, styloid process, lesser horn, superior portion off body of hyoid is from

second arch

17

greater horn, inferior portion of body of hyoid is from

third

18

laryngeal cartilage is from

fourth arch and 6th

19

treacher's collins syndrome

first arch syndrome
malar/mandibular hypoplasia, down slanting palepebral fissures, malformed external ears

20

robins sequence

first arch syndrome, micrognathia, cleft palate and glossoptosis

21

1st pharyngeal pouch gives rise to

tympanic membrane and paryngotympanic tube, ear drum

22

2nd pharyngeal pouch gives rise to

palatine tonsil and tonsilar fossa

23

superior 3rd pharyneal pouch gives rise to

inferior parathyroid gland

24

inferior 3rd pharyngeal pouch gives rise to

thymus gland

25

superior fourth arch gives rise to

superior thyroid gland

26

inferior fourth arch gives rise to

ultimobranchial body (calcitonin)

27

pharyngeal groove 1 gives rise to

tympanic membrane and external auditory canal

28

pharyngeal groove 2 gives rise to

cervical sinusd

29

where is the most common location for ectopic thyroid tissue

at base of tonque

30

pharyngeal arches are lined with

endoderm

31

pharyngeal grooves are lined with

ectoderm

32

what produces the opening from the pharynx to the amnionic cavity

oropharyngeal membrane

33

when do the salivary glands develop

7th week

34

parenchyma of the salivary glands is from

neural crest cells

35

what is the muscular component of the pharyngeal arch from ?

somitomeres

36

middle part of the first arch gives rise to

anterior ligament of malleus and sphenomandibular ligament

37

what is the first endocrine gland to form

thyroid gland

38

what is the connection between the tongue and the thyroid?

glossopharyngeal duct

39

branchial cysts/fistula

results from the persistence of the pharyngeal grooves; branchial fistulas occur when the second arch fails to grow over the third and fourth arches, formation of a lateral cervical cyst; fistulas have an external opening on the lateral aspect of the neck

40

branchial vestiges

normally pharngeal cartilages disappear; remnants of cartilage or bony elements under the skin anterior to the inferior 1/3 of the sternocleidomastoid persists

41

ectopic thyroid tissue

remnants of thyroid tissue along course of their migration

42

thyroglossal cysts and sinues

lie in the mdiline of the neck and re a tubule rementat of the thyroglossal duct

43

neural crest are involved in what two diseases

treacher collins syndrome and pierre robin sequence

44

digeorge anomaly

involves abnormalities of the heart, parathyroid gland, face, and thymus gland. affected individuals will have congenital heart disease, ususual facial features, low set ears, small jawbone, wide set eyes and without parathyroid glands

45

somatic sensation from anterior 2/3 is from

CN V

46

visceral sensation from anterior 2/3 is from

CN VII

47

CN IX provides sensory to

posterior 1/3 of tongue

48

CN X carries

taste from the root of the tonque