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?