RSL - Repro - Embryology Flashcards Preview

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Flashcards in RSL - Repro - Embryology Deck (62):
1

Sonic Hedgehog gene: Production

at base of limbs

2

Sonic Hedgehog gene: action

Patterning along anterior to posterior axis

3

Wnt-7 gene: production

At apical ectodermal ridge

4

Wnt-7 gene: action

Patterning along Dorsal-ventral axis

5

FGF gene: production

Apical ectodermal ridge

6

FGF gene: Action

Stimulates mitosis of underlying mesoderm --> lengthening of limb

7

Homeobox (Hox) genes: action

Segmentation of embryo in Craniocaudal direction. (mutations --> appendages in wrong locations)

8

HCG and implantation of blastocyst: Week _

1

9

Bilaminar disk (epiblast, hypoblast): Week _

2

10

Gastrulation: Week _

3

11

Neural tube formation: week _

4

12

Extremely sensitive to teratogens: Weeks _

4-8

13

Heart beats: week _

4

14

4 limbs: week_

4

15

Genetalia: week_

10

16

Embyologic origins: Lens of eye

Surface ectoderm

17

Embyologic origins: Sensory organs of ear

Surface ectoderm

18

Embyologic origins: Anal canal below pectinate line

Surface ectoderm

19

Embyologic origins: Oral cavity

Surface ectoderm

20

Embyologic origins: Parotid, sweat, mammary glands

Surface ectoderm

21

Embyologic origins: Oligodendrocytes

Neuroectoderm

22

Embyologic origins: PNS

Neural crest

23

Embyologic origins: Shwann cells

Neural crest

24

Embyologic origins: Melanocytes

Neural crest

25

Embyologic origins: Parafollicular (C ) cells

Neural crest

26

Embyologic origins: Pia and arachnoid

Neural crest

27

Embyologic origins: Bones of skull

Neural crest

28

Embyologic origins: Aorticopulmonary septum

Neural crest

29

Embyologic origins: Serous linings of body cavities

Mesoderm

30

Embyologic origins: Spleen

Mesoderm

31

Embyologic origins: Testes/ovaries

Mesoderm

32

Embyologic origins: Dermis

Mesoderm

33

Embyologic origins: Vagina

Mesoderm

34

Embyologic origins: cardiovascular structures

Mesoderm

35

Embyologic origins: kidneys

Mesoderm

36

Embyologic origins: Adrenal cortex

Mesoderm

37

Embyologic origins: Bone

Mesoderm

38

Embyologic origins: Odontoblasts

Neural crest

39

Embyologic origins: Astrocytes

Neuroectoderm

40

Embyologic origins: Ependymal cells

Neuroectoderm

41

Embyologic origins: Gut tube

Endoderm

42

Embyologic origins: most of urethra

Endoderm

43

Embyologic origins: Luminal epithelial derivatives

Endoderm

44

Embyologic origins: Liver

Endoderm

45

Embyologic origins: Pancreas

Endoderm

46

Embyologic origins: Lungs

Endoderm

47

Embyologic origins: Eustatian tube

Endoderm

48

Embyologic origins: thymus

Endoderm

49

Embyologic origins: Parathyroid

Endoderm

50

Embyologic origins: Thyroid follicular cells

Endoderm

51

Embryologic origins: ANS

Neural crest

52

Errors in morphogenesis: Disruption

secondary breakdown of previously normal tissue (amniotic band)

53

Errors in morphogenesis: Deformation

Extrinsic disruption; occurs after embryonic period

54

Errors in morphogenesis: Malformation

Intrinsic disruption; Occurs during embryonic period (3-8weeks)

55

Monozygotic twinings days: Dichorionic Diamnionic

0-4 days (25%) (2 cell stage)

56

Monozygotic twinings days: monochorionic Diamnionic

4-8 days (75%) (Morula)

57

Monozygotic twinings days: Monochorionic Monoamniotic

8-12 days (

58

Monozygotic twinings days: monochorionic monoamniotic conjoined twins

>13 days (formed embryonic disk

59

Allantois --> (embryonic derivation)

Umbilical arteries and Vein

60

Allantois --> (adult)

Urachus

61

Allantois formation: week_

3

62

Vitelline duct obliteration: week_

7