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DEN 7111 Development > Exam 1 Structures/Germ Layer Fates > Flashcards

Exam 1 Structures/Germ Layer Fates Flashcards

1
Q

What structures are identifiable in week 4?

A
  1. neural tube
  2. pharyngeal arches
  3. forebrain
  4. caudal eminence
  5. upper limbs buds
  6. otic pits
  7. lens placode
  8. lower limb buds
  9. rudiments of CV system
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2
Q

What structures are identifiable in week 5?

A
  1. minor changes in body form
  2. increased cranial growth
  3. cervical sinus
  4. some increased growth and development of existing structures, particularly limb buds
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3
Q

What structures are identifiable in week 6?

A
  1. upper limb buds show regional differentiation; large hand plates; digital rays
  2. auricular hillock
  3. external acoustic meatus
  4. heart prominence prominent
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4
Q

What structures are identifiable in week 7?

A
  1. limbs continue to develop
  2. communication between primordial gut and yolk sac decreases
  3. intestines enter the extraembryonic coelom in the proximal part of the umbilical cord
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5
Q

What structures are identifiable in week 8?

A
  1. digits of hands are separated, but webbed
  2. scalp vascular plexus becomes prominent
  3. head still disproportionately large
  4. neck region established
  5. eyelids more obvious and close by end of 8th week due to epithelial fusion
  6. auricles of the ear begin to take shape
  7. some sex differentiation but inaccurate identification
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6
Q

Epidermis arises from

A

surface ectoderm

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7
Q

Hair arises from

A

surface ectoderm

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8
Q

Nails arise from

A

surface ectoderm

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9
Q

Cutaneous glands arise from

A

surface ectoderm

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10
Q

Mammary glands arise from

A

surface ectoderm

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11
Q

Anterior pituitary gland arises from

A

surface ectoderm

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12
Q

Parenchyma of salivary gland arises from

A

surface ectoderm

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13
Q

Enamel of teeth arise from

A

surface ectoderm

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14
Q

Lens arises from

A

surface ectoderm

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15
Q

Inner ear arises from

A

surface ectoderm

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16
Q

Mesoderm divides into:

A
  1. paraxial mesoderm
  2. lateral plate mesoderm
  3. intermediate mesoderm
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17
Q

Epithelial component of trachea arises from:

A

endoderm

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18
Q

Bronchi and lungs arise from

A

endoderm

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19
Q

Epithelium of GI tract arise from

A

endoderm

20
Q

Urinary bladder and urachus arise from

A

endoderm

21
Q

Epithelial component of pharynx arises from

A

endoderm

22
Q

Thyroid arises from

A

endoderm

23
Q

Tympanic cavity arises from

A

endoderm

24
Q

Pharyngotympanic tube arises from

A

endoderm

25
Q

Tonsils and parathyroids arise from

A

endoderm

26
Q

Cranial and sensory ganglia and nerves arise from:

A

neural crest

27
Q

Adrenal medulla arise from:

A

neural crest

28
Q

Ectomesenchyme bones and skull arise from

A

neural crest

29
Q

Dentin arises from

A

neural crest

30
Q

Periodontal ligament arises from

A

neural crest

31
Q

Alveolar bone arises from

A

neural crest

32
Q

Posterior pituitary arises from

A

neuroectoderm

33
Q

Pineal body arises from

A

neuroectoderm

34
Q

Retina arises from

A

neuroectoderm

35
Q

CNS arises from

A

neuroectoderm

36
Q

Urogenital system arises from

A

Intermediate mesoderm

37
Q

Muscles of trunk and skeleton, except skull, arise from

A

paraxial mesoderm

38
Q

Dermis of skin arises from

A

paraxial mesoderm

39
Q

Connective tissue (mesenchyme) arises from

A

paraxial and lateral plate mesoderm

40
Q

Muscles of viscera arise from

A

Lateral plate mesoderm

41
Q

Serous membranes of pleura arise from

A

Lateral plate mesoderm

42
Q

Pericardium and peritoneum come from

A

Lateral plate mesoderm

43
Q

Blood and lymph cells arise from

A

Lateral plate mesoderm

44
Q

CV and lymphatic systems arise from

A

Lateral plate mesoderm

45
Q

Spleen arises from

A

Lateral plate mesoderm

46
Q

Adrenal cortex arises from

A

Lateral plate mesoderm

DEN 7111 Development (19 decks)

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