Nervous system

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Across
  1. 3. it deals with activities such as blood pressure control and heart rate adjustment
  2. 5. bodys prime communication and coordination network
  3. 6. As these divide, snake among organs and tissue, and infiltrate every tiny nook and cranny,they form the network of the ___
  4. 8. part of sympathetic nervous system, also called paravertebral ganglia; conveys stress signals to body
Down
  1. 1. central to the bodys structure and workings
  2. 2. one of many nodules that send sensory information to brain via spinal cord
  3. 4. fibrous tissue connecting spinal cord to coccyx
  4. 7. part of central nervous system, extends from brain down to back, protected by vertebral column