Body Systems

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Across
  1. 1. what color blood cells squeeze through blood vessels?
  2. 5. another name for red blood cells
  3. 7. this nervous system contains: brain + spinal cord
  4. 8. every one of these is connected to another one
  5. 10. this beats 2.5 billion times in your life
  6. 13. is a filter, heater and humidifier for your body
  7. 14. some have an extra one of these(causes health issues)
  8. 15. this damages your lungs severely
  9. 17. this is one of a few natural mechanisms
  10. 20. this animal loses thousands of teeth in their life
Down
  1. 2. this type of energy is sent to neurons
  2. 3. there are how many different colored blood cells?
  3. 4. there are 100 billion neurons in this organ
  4. 6. the smallest muscles in the body
  5. 9. the largest muscle in the body
  6. 11. lots of these in the body(made up of 3 parts)
  7. 12. the type of muscles in your heart
  8. 16. the only organ that can float in water
  9. 18. our bodies need this to breathe
  10. 19. the strongest muscle in the body