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Flashcards in embryology lecture Deck (31)
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1
Q

oroauricular facial dyosotosis

A

midface deficiences

2
Q

treacher collins

A

mandible hypoplasia and malformed ears

3
Q

warrdenberg

A

often 2 diff colored eyes, broad face, pigmentation problems

4
Q

pharyngeal arches

A

develop bi-laterally ventral to the neural tube

5
Q

each arch is a composite finger composed of

A

mesenchyme and mesoderm and neural crest, ectoderm and endoderm-inside and out

6
Q

1st arch

A

forms mandible, malleus, incus of middle ear, sphenomandibular ligament, muscles of mastication, CN V

7
Q

2nd arch

A

forms stapes, styloid process of temporal bone, superior portion of the hyoid bone, stylohyoid ligament, muscles of facial expression, CN VII, VIII

8
Q

3rd arch

A

inferior body of the hyoid bone, stylopharyngeus,, CN IX

9
Q

4th -6th arches

A

forms laryngeal cartilages- thyroid and cricoid cartilages, striated muscle of pharyngeal laryngeal and esophagus, CN X

10
Q

mouth forms from the

A

stomidium

11
Q

foramen cecum

A

transient structure linked to thyroid gland and thyroglossal duct

12
Q

T/F - epithemlium comes from the endoderm and ectoderm- independent on the inside of each arch and outside respectively

A

true

13
Q

structures inside the arch arise from

A

mesenchyme or neural crest

14
Q

neural crest comes from the

A

ectoderm

15
Q

neurons that arise from rhombomeres 1-3 contribute to

A

arch 1

16
Q

neurons that arise from rhombomeres 4-5 contribute to

A

arch 2

17
Q

T/F - 4th arch does not get a contribution from the rhombomeres

A

True

18
Q

paraxial mesoderm gives rise to

A

striated meuscles of the head and neck

19
Q

cleft lip derives from problems in the

A

neural crest

20
Q

ear canal froms from cleft ____

A

1

21
Q

cervical sinus

A

obliterated as clefts disappear

22
Q

pharyngeal pouches derive from the

A

endoderm

23
Q

2nd pharyngeal pouch gives rise to the

A

palatine tonsils

24
Q

3rd pharyngeal pouch gives rise to the

A

Inferior parathyroid glands, thymus,

25
Q

4th pharyngeal pouch gives rise to the

A

superior parathyroid glands, Ultimobranchial bodies

26
Q

Tongue Surface is composed of Arch #’s

A

1,3,4

27
Q

CN of ant. 2/3 of tongue

A

V, VII

28
Q

CN of post. 1/3 of tongue

A

IX+X, IX

29
Q

CN of tongue Musculature

A

XII

30
Q

of facial primordia

A

5

31
Q

what are Taratogens

A

Monster causers