The nervous system has two different major parts. The two parts are the central nervous system and the peripheral nervous. The central nervous system or the CNS contains the brain and the spinal cord. All together, the brain and the spinal cord serve the nervous system's command station.
== Greg Maddux Signed Baseball Card == A Greg Maddux autographed baseball card is worth between $20. -$30. Prices may vary based on condition, and the type of authenticity that accompanies the signature. Signatures that have not been authenticated could sell at half the market value or less.
The 1975 Topps #233 Milwaukee Brewers Baseball Gold Card goes for about $40, an autographed 1979 Topps #95 HOF Robin Yount Baseball card with a grade for about $45, and the 1989 Donruss #55 HOF Baseball Card, also graded for $35 to $40. The price of a Robin Yount rookie card is determined by a few factors.