Nervous & Endocrine System

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Across
  1. 3. the long, thin cells of nerve tissue along which messages travel to and from the brain
  2. 4. part of the peripheral nervous system that controls internal biological functions
  3. 8. the chemicals released by neurons, which determine the rate at which other neurons fire
  4. 9. Nervous System which is made up of the smaller branches of nerves that reach other parts of the body
  5. 10. chemical communication system, using hormones, by which messages are sent through the bloodstream
Down
  1. 1. part of the peripheral nervous system that controls voluntary movement of skeletal muscles
  2. 2. chemical substance that carry messages through the body in blood
  3. 5. the gap that exists between individual nerve cells
  4. 6. center of control of the endocrine system that secretes a large number of hormones
  5. 7. Nervous System includes brain and spinal cord