Answer needed..please.

[Lucus]

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1. Initially, the developing heart is

A. induced by the notochord
B. positioned posterior to the notochord
C. positioned anterior to the prochordal plate.
D. between the prochordal plate and the notochord

 

[rag]

1. Initially, the developing heart is

A. induced by the notochord
B. positioned posterior to the notochord
C. positioned anterior to the prochordal plate.
D. between the prochordal plate and the notochord

i think , the ans is c - positione anterior to the prochordal plate but i am not sure.
bye, rag

 

[fido!]

I GUESS U R RIGHT!

i think , the ans is c - positione anterior to the prochordal plate but i am not sure.
bye, rag

 

[richa sharma]

Hi,
The ans is definately "C"...At around day 18-19, clusters of angiogenetic cells migrate from both sides of the embryo medially towards the area of the oropharyngeal membrane to form a horse-shoe shaped plexus of vessels. This plexus initially lies anterior to the prochordal plate and neural plate. However, as the embryonic folding progresses, it causes the developing cardiogenic area. Lateral folding of the germ disc will cause the two endothelial cardiac tubes to approximate each other in the midline, and eventually fuse together to form a single endothelial cardiac tube. While the excessive growth of the neural tube causes the developing heart to acquire a more ventral position. 🙂

 

[fido!]

thanks,richa!

Hi,
The ans is definately "C"...At around day 18-19, clusters of angiogenetic cells migrate from both sides of the embryo medially towards the area of the oropharyngeal membrane to form a horse-shoe shaped plexus of vessels. This plexus initially lies anterior to the prochordal plate and neural plate. However, as the embryonic folding progresses, it causes the developing cardiogenic area. Lateral folding of the germ disc will cause the two endothelial cardiac tubes to approximate each other in the midline, and eventually fuse together to form a single endothelial cardiac tube. While the excessive growth of the neural tube causes the developing heart to acquire a more ventral position. 🙂