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Spinal Cord. This image is a higher magnification of the previous image illustrating a large motor neuron (red arrow). Note the nucleus, which is very characteristic of neurons: large (relative to surrounding nuclei), very little heterochromatin, and a single, prominent nucleolus. Only one process is visualized projecting from the perikaryon. Since this process contains Nissl, it would be identified as a dendrite (yellow arrows). A number of smaller nuclei are present (black arrows). The nuclei belong to a group of cells known as Neuroglia. They will be identified on a later slide