Final answer:
In the white matter of the spinal cord, you would primarily find myelinated axons, which are responsible for the color and function of white matter.
Step-by-step explanation:
The white matter of the spinal cord primarily contains myelinated axons.
White matter in the central nervous system, which includes the spinal cord, is characterized by the presence of myelinated axons. These axons are covered by a myelin sheath, which is produced by oligodendrocytes in the central nervous system and is responsible for the white coloration of this tissue. The myelin sheath enhances the speed at which electrical impulses transmit along the axon, making neural communication more efficient.
The neuron cell bodies, on the other hand, are found within the gray matter of the spinal cord, along with interneurons. Glial Cells, such as microglia and astrocytes, also reside in the central nervous system but are not exclusive to white or gray matter and assist in a variety of supportive functions. However, it is particularly the myelinated axons that define the composition of spinal cord white matter.