Embryology derivatives Flashcards

1
Q

Lens of eye

A

Surface ectoderm

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2
Q

Spleen

A

Mesoderm (derived from foregut mesentary)

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3
Q

Eustachian tube

A

endoderm (luminal epithelial derivative)

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4
Q

Muscle, bone, CT

A

Mesoderm

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5
Q

Gut tube epithelium (including anal canal above the pectinate line)

A

Endoderm

eg esophagus

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6
Q

Lymphatics

A

Mesoderm

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7
Q

3 types of ectoderm

A

neural crest
neuroectoderm
surface ectoderm

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8
Q

Brain (CNS neurons, neurohypophysis, oligodendrocytes, astrocytes, pineal gland)

A

neuroectoderm

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9
Q

PNS (DRG, CN, autonomic ganglia, Schwann cells)

A

Neural crest

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10
Q

Kidneys

A

mesoderm

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11
Q

ovaries, testes

A

mesoderm

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12
Q

dermis

A

mesoderm

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13
Q

pancreas

A

endoderm

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14
Q

gallbladder, liver, lungs

A

endoderm

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15
Q

what structure induces ectoderm to form neuroectoderm (neural plate)

A

notochord

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16
Q

blood

17
Q

cardiovascular structures

18
Q

most of urethra and lower vagina

19
Q

upper vagina

20
Q

Thyroid, parathyroid, thyroid follicular cells

A

endoderm (luminal epithelial derivatives)

21
Q

serous linings of body cavities (eg peritoneum)

22
Q

chromaffin cells of adrenal medulla

A

neural crest

23
Q

parafollicular cells of thyroid

A

neural crest

24
Q

sweat, mammary glands

A

surface ectoderm

25
melanocytes
neural crest
26
adenohypophysis
surface ectoderm
27
retina
neuroectoderm
28
Hirschsprung disease is due to a defect in what embryonic tissue?
neural crest (forms ganglionic plexus) Always affects rectum and anus (neural crest cells migrate caudally) 75% of the time affects sigmoid colon
29
Above pectinate
endoderm
30
below pectinate
ectoderm
31
difference between multipotent and totipotent stem cells?
Totipotent - derived from more primitive cells than multipotent. Zygote is totipotent during normal differentiation. Can develop into all the various cell types. Once in the 3 basic tissue types (mesoderm, ectoderm, and endoderm), the tissues are multipotent.
32
What structure in the female develop from the same structures that failed to dev in hypospadia?
Male - urethral folds | female - labia minor
33
Crura of the clitoris in females is equivalent to what in the male?
Crura of penis | Both developed from genital tubercle
34
Labia majora in females is equivalent to what in the male?
scrotum
35
Round ligament and ovarian ligaments are adult remnants of the caudal genital ligaments. These are equivalent to what in the male?
Caudal portions of the gubernaculum testis
36
Craniopharyngiomas are derived from what? What else forms from this?
Rathke's pouch - oral ectoderm (diverticulum of the roof of the embryonic oral cavity) Anterior pituitary arises from this as well
37
What forms the aorticopulmonary septum and endocardial cushions.
Ectodermal Neural crest cells
38
Microglia (like Macrophages)
Mesoderm