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SC.912.L.14.25 What are the major parts of the spinal cord? Grey Matter ◦ Cell bodies of neurons ◦ Dendrites White Matter Axons Grooves ◦ Dorsal median sulcus ◦ Ventral fissure Horns ◦ Dorsal horns – sensory neurons ◦ Ventral horns – motor neurons White matter is organized into three columns ◦ Anterior, Lateral, and Posterior Within the white matter there are specialized regions of axons ◦ Sensory Ascending Tracts conduct nerve impulses to the brain ◦ Motor Descending Tracts transmit impulses down the spinal cord How are they similar? How are they different?