systems

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Across
  1. 3. retina
  2. 5. part of central nervous system
  3. 6. first against pathogen
  4. 9. carries signals from your brain to your spinal chored to parts of the body
  5. 10. make antibodies and memory
  6. 14. pupil
  7. 15. signals the body to attack
Down
  1. 1. receptors
  2. 2. includes everthing except spinal chord and brain
  3. 4. smell
  4. 7. cells that engulf
  5. 8. small gap between an axon and a dendrite
  6. 11. involuntary reaction
  7. 12. sight smell taste touch sound
  8. 13. taste