9.30 Germ Layers 2 Flashcards

1
Q

where do the bones in the face come from?

A

neural crest cells

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2
Q

to make major vessels, angioblasts proliferate and assemble into loose structures called _______ ________. These will only form into blood vessel tubes with signals from the _________.

A

vascular cords

endoderm

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3
Q

myocardial cells that form the heart muscle arise from the __________ ___________ in the cariogenic area

A

splanchnic mesoderm

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4
Q

blood vessel formation achieved by branching and extension from the primary vessels

A

angiogenesis

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5
Q

most bone in the body comes from which germ layer?

A

mesoderm

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6
Q

a signal from the _______ is essential for heart development

A

endoderm

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7
Q

endothelial precursor cells (called ________), within the __________, arise

A

angioblasts

mesoderm

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8
Q

failure of complete regression of the yolk sac – common birth defect, which is an outpouching of the ileum at the end of the small intestine.

A

Meckels Diverticulum

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9
Q

the skeletal muscles come from the _________ (region of somite)

A

myotome

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10
Q

skeletal muscle cells are ____-nucleate

A

multi

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11
Q

Signals from ______ are required for liver differentiation and development

A

heart

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12
Q

folding of the body wall leaves the heart outside of the chest.

A

ectopia cordis

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13
Q

in lateral folding, the endoderm becomes surrounded by the ________ _________ to form the gut tube

A

splanchnic mesoderm

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14
Q

the muscles of the face originate from the ________ in the head region

A

somitomeres

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15
Q

visceral organs lie outside of body wall

A

gastroschisis

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16
Q

Blood vessel formation from individual angioblasts

A

vasculogenesis

17
Q

the endothelial cells that are the inner lining of blood vessels come from which germ layer?

A

mesoderm

18
Q

_______________ (process name) is only responsible for making the major blood vessels in the embryo

A

vasculogenesis

19
Q

gene known to regulate development of heart muscle:

A

Nkx2-5