9.30 Germ Layers 2 Flashcards
where do the bones in the face come from?
neural crest cells
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
myocardial cells that form the heart muscle arise from the __________ ___________ in the cariogenic area
splanchnic mesoderm
blood vessel formation achieved by branching and extension from the primary vessels
angiogenesis
most bone in the body comes from which germ layer?
mesoderm
a signal from the _______ is essential for heart development
endoderm
endothelial precursor cells (called ________), within the __________, arise
angioblasts
mesoderm
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
the skeletal muscles come from the _________ (region of somite)
myotome
skeletal muscle cells are ____-nucleate
multi
Signals from ______ are required for liver differentiation and development
heart
folding of the body wall leaves the heart outside of the chest.
ectopia cordis
in lateral folding, the endoderm becomes surrounded by the ________ _________ to form the gut tube
splanchnic mesoderm
the muscles of the face originate from the ________ in the head region
somitomeres
visceral organs lie outside of body wall
gastroschisis
