9.30 Germ Layers 2 Flashcards Preview

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Flashcards in 9.30 Germ Layers 2 Deck (19):
1

where do the bones in the face come from?

neural crest cells

2

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

vascular cords
endoderm

3

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

splanchnic mesoderm

4

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

angiogenesis

5

most bone in the body comes from which germ layer?

mesoderm

6

a signal from the _______ is essential for heart development

endoderm

7

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

angioblasts
mesoderm

8

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.

Meckels Diverticulum

9

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

myotome

10

skeletal muscle cells are ____-nucleate

multi

11

Signals from ______ are required for liver differentiation and development

heart

12

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

ectopia cordis

13

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

splanchnic mesoderm

14

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

somitomeres

15

visceral organs lie outside of body wall

gastroschisis

16

Blood vessel formation from individual angioblasts

vasculogenesis

17

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

mesoderm

18

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

vasculogenesis

19

gene known to regulate development of heart muscle:

Nkx2-5