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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..
The spinal ganglia or dorsal root ganglia contain the cell bodies of sensory neurons entering the cord at that region. nerve-a group of fibers (axons) outside the CNS. The spinal nerves contain the fibers of the sensory and motor neurons.A nerve does not contain cell bodies.They are located in the ganglion (sensory) or in the gray matter (motor). tract-a group of fibers inside the CNS. The spinal tracts carry information up or down the spinal cord, to or from the brain.he spinal ganglia or dorsal root ganglia contain the cell bodies of sensory neurons entering the cord at that region. nerve-a group of fibers (axons) outside the CNS. The spinal nerves contain the fibers of the sensory and motor neurons. A nerve does not contain cell bodies.