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PART 1 > Embryology > Flashcards

Embryology Flashcards

1
Q

which 2 layers foes the eye develop from?

A

ectoderm and mesoderm

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2
Q

Ciliary body epitheilium derived from?

A

Neuroectoderm

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3
Q

Iris epitheliumderived from?

A

Neuroectoderm

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4
Q

Iris sphincter and dilator muscles derived from?

A

Neuroectoderm

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5
Q

Optic nerve axons and glia derived from?

A

Neuroectoderm

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6
Q

RPE derived from ?

A

Neuroectoderm

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7
Q

Vitreous derived from?

A

Neuroectoderm, nerual crest cells and mesoderm

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8
Q

Orbital bones derived from?

A

Neural crest cells

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9
Q

Orbital cartilage dervied from?

A

Neural crest cells

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10
Q

Choroid/iris stroma derived from?

A

Neural crest cells and mesoderm

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11
Q

Ciliary ganglion

A

Neural crest cells

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12
Q

Connective tisseu derived from?

A

Neural crest cells

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13
Q

Corenal stroma and endothelium derived from?

A

Neural crest cells

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14
Q

EOM sheats and tendons derived from?

A

Neural crest cells

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15
Q

Orbital fat dervied from?

A

Neural crest cells & Mesoderm

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16
Q

Melanocytes derived from?

A

Neural crest cells

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17
Q

Meningeal sheaths of optic nerve derived from?

A

Neural crest cells

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18
Q

Schwann cells of ciliary nerves derived from?

A

Neural crest cells

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19
Q

Sclera derived from?

A

Neural crest cells and mesoderm

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20
Q

Trabecular meshwork derived from?

A

Neural crest cells

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21
Q

Corneal epithelium derived from?

A

surface ectoderm

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22
Q

Conjunctical epithelium derived from?

A

surface ectoderm

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23
Q

epithelium, glands, skin cilia, caruncle derived from derived from?

A

surface ectoderm

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24
Q

lacrimal drainage system derived from?

A

surface ectoderm

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25
Q

lens derived from?

A

surface ectoderm

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26
Q

Choroid derived from?

A

Mesoderm

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27
Q

EOM fibres derived from?

A

Mesoderm

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28
Q

Iris stroma derived from?

A

mesoderm

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29
Q

Vascular endothelium derived from?

A

Mesoderm

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30
Q

What day does optic primordium appear

A

22 days

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31
Q

What day does Optic vesicle evaginate and neural crest cells migrate to surround vesicle

A

25 days

32
Q

What day does vesicle induce lens placode

A

28 days

33
Q

What day does eyelids folds appear

A

4-5 weeks

34
Q

What day does Invagination of optic lens and vesicle occur

A

2 months

35
Q

What day does hyaloids arter enter eye via embryonic fissure

A

2 months

36
Q

What day does Closure of embyonic fissure begin

A

2 months

37
Q

What day does pigments granules appear in RPE

A

2 months

38
Q

What day does primordia of lateral rectus and superior oblique muscles grow anteriorly

A

2 months

39
Q

What day does eyelid folds meet and fuse

A

2 months

40
Q

What day does migration of reinal cells begein

A

2 months

41
Q

What day does neural crest cells of endothelium migrate centrally

A

2 months

42
Q

What day does cavity of lens vesicle obliterated

A

2 months

43
Q

What day does bruch membrane appear

A

2 months

44
Q

What day does rods and cones differentiate

A

3 months

45
Q

What day does ciliary body start to develop

A

3 months

46
Q

What day does cortex veins pierce sclera

A

3 months

47
Q

What day does retinal vessel grow into NFL near optic disc

A

4 months

48
Q

What day does folds of ciliary processes paaer

A

4 months

49
Q

What day does iris sphincter develop

A

4 months

50
Q

What day does Descemet mebrane forms

A

4 months

51
Q

What day does SChlemm canal appear

A

4 months

52
Q

What day does Hyaloid system start to regress

A

4 months

53
Q

What day does glands and cillia develop

A

4 months

54
Q

What day does photoreceptor develop inner segment

A

5 months

55
Q

What day does choroidal vessels form layers

A

5 months

56
Q

What day does Iris stroma is vascualrised

A

5 months

57
Q

What day does eyelids begins to separate

A

5 months

58
Q

What day does ganglion cells thicken in macula

A

6 months

59
Q

What day does recurrent arterial branches joing the choroidal vessels

A

6months

60
Q

What day does dialtor muscle of iris form

A

6 months

61
Q

What day does outer segments of potoreceptors differentiate

A

7 months

62
Q

What day does central fovea start to thin

A

7 months

63
Q

What day does fibrous lamina cribrosa form

A

7 months

64
Q

What day does choroidal mealnocytes prodcue pigment

A

7 months

65
Q

What day does circular muscle form in ciliary body

A

7 months

66
Q

What day does anterior chamber angle complete formation

A

8 months

67
Q

What day does hyaloid system disappear

A

8 months

68
Q

WHen do retinal vessels reach the periphery

A

9 months

69
Q

WHen does myelination of optic nerve fibres complete

A

9 months

70
Q

When does pupiliary membrane disappear

A

9 months

71
Q

Failure of optic fissures to close cause

A

COloblomas

72
Q

Main type of collagen in lens capsule

A

type IV

73
Q

Hyaloid artery eventually becomes?

A

Central reintal artery

74
Q

regressing hyaloid canal is site of the future?

A

CLoquet canal

75
Q

WHen does lacrimal gland reflex tear production being?

A

> 20 days after birth

PART 1 (10 decks)

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