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Embryology Derivatives > Layers And Their Derivatives > Flashcards

Layers And Their Derivatives Flashcards

0
Q

Mesoderm

A

All skeletal and connective tissue, blood and muscle

Prechordal, paraxial, axial, intermediate and lateral plate

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1
Q

Ectoderm

A

Skin and CNS

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2
Q

Endoderm

A

Gut tube, pharynx and respiratory tube

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3
Q

Neural crest cells

A

Melanocytes, Schwann cells, dorsal root ganglia, enteric nervous system, noradrenaline neurones, cholinergic neurones

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4
Q

Non-neuronal ectoderm

A

Skin, nails, tooth enamel + associated structures

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5
Q

Axial mesoderm (notochord)

A

Basis of midline axial skeleton

Source of neural-inducing and patterning signals

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6
Q

Paraxial mesoderm

A

Somitomeres (head)

Somites (trunk, 37 pairs)

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7
Q

Somitomeres

A

Head mesenchyme

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8
Q

Somites

A

Sclerotome

Dermamyotome

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9
Q

Sclerotome

A

Vertebral body - surrounding notochord

Vertebral arch - surrounding neural tube

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10
Q

Dermamyotome

A

Dermatome

Myotome

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11
Q

Dermatome

A

Contributes to dermis - fat and connective tissue of the neck and back

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12
Q

Myotome

A

Muscles - dorsal epimerise and ventral hypomere

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13
Q

Intermediate mesoderm

A

Urogenital structures

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14
Q

Lateral plate mesoderm

A

Divides to line the intra-embryonic coelum (primitive body cavity) forming:
Somatic (parietal) mesoderm
Splanchnic (visceral) mesoderm

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15
Q

Somatic (parietal) mesoderm

A

Adjacent to ectoderm
Dermis
Limbs

16
Q

Splanchnic (visceral) mesoderm

A

Adjacent to endoderm
Gut wall
Vascular system

17
Q

Buccopharyngeal membrane

A

Mesoderm absent
Anterior
End of gut tube

18
Q

Cloacal membrane

A

Mesoderm absent
Posterior
End of gut tube

19
Q

1st pharyngeal arch

A

Trigeminal nerve
Muscles of mastication
Maxilla and mandible
Malleus and incus

20
Q

2nd pharyngeal arch

A 
Facial nerve
Muscles of facial expression
Styled process
Stapes
Hyoid
21
Q

3rd pharyngeal arch

A

Glossopharyngeal nerve
Stylopharnygeal muscle
Hyoid

22
Q

4th pharyngeal arch

A

Vagus nerve
Pharyngeal muscles
Laryngeal cartilage

23
Q

6th pharyngeal arch

A

Accessory nerve
Pharyngeal muscles
Laryngeal cartilages

Embryology Derivatives (2 decks)

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