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The dorsal nerve cord is one of the embryonic features unique to chordates, along with a notochord, a post-anal tail and pharyngeal slits. It is a hollow cord dorsal to the no â¦ tochord.ike humans, A dorsal nerve cord would be present on the back of the person or chordate. Some invertebrates such as arthropods, have a ventral nerve cord on the belly..
While still remaining attached to the dorsal summit of the neural cord they grow to a considerable size (fig. 264 B, pr). The base of the neural arch is also concave in this vertebra. The notochord is unconstricted, but the neural and haemal arches are well-developed, and the neural spines are long and slender.