in which part of the body or where are specifically the dorsal nerve cord and notochord human have ?

The notochord is a transient development in human embryos and is not retained post-embryotic. Our spinal cord emerges from an initial embryotic notochord stage. I hope this helps.

That was an odd thing to ask. Do you think it might have been homework?

In retrospect, I think you're right. Still, I didn't given him a thorough answer, which is why I included the links. Perhaps, he'll research the subject further.