embryology question

[WayneSU]

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k someone tell me if i got this right....
so notochord is from the mesoderm that gives rise to the neural tube which is from the ectoderm. the neural tube pinches off the ectoderm layer and gives rise to the brain and spinal cord. so the process by which this happen is the notochord which is beneath the ectoderm layer, causes the ectoderm to start thickening by elongating their cells. then these fold into a tube like shape forming the neural tube.

is this correct

 

[DRHOYA]

I'm not sure if you need to know characteristics of development that in depth, but yes you are right about notochord from mesoderm, and neural tube from ectoderm. Brain, spinal chord......heck, the entire nervous system from ectoderm.

 

[harrygt]

k someone tell me if i got this right....
so notochord is from the mesoderm that gives rise to the neural tube which is from the ectoderm. the neural tube pinches off the ectoderm layer and gives rise to the brain and spinal cord. so the process by which this happen is the notochord which is beneath the ectoderm layer, causes the ectoderm to start thickening by elongating their cells. then these fold into a tube like shape forming the neural tube.

is this correct

Yes, this is absolutely correct, and knowing these things is reasonable for DAT. I just reviewed the embryology chapter yesterday from my bio book.

 

[WayneSU]

So in human, the notochord dissappears when we are adults, right? so does that mean its only function is to help form the neural tube?

 

[WayneSU]

So in human, the notochord dissappears when we are adults, right? so does that mean its only function is to help form the neural tube?

anybody

 

[harrygt]

So in human, the notochord dissappears when we are adults, right? so does that mean its only function is to help form the neural tube?

No buddy. The notochord develops into your vertebral column. That is its major function.

 

[osimsDDS]

only in higher chordates does the notochord develop into your vertebral column, in lower chordates the notochord is present throughout the life of the animal...this is witnessed in amphioxous and tunicates, sea squirts...these are chordates that are not vertebrates (they are invertebrates)