Human Body Phenomenon

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Across
  1. 2. protects internal organs from injury
  2. 4. muscle is nonstriated and involuntary
  3. 7. are released on demand
  4. 8. abbreviation of central nervous system
  5. 9. provides the essential nutrients and oxygen while removing many of the metabolic wastes
  6. 10. the largest organ of the body
  7. 12. prevents the friction between bones
  8. 14. immovable joints
  9. 15. tissue storing and moving substances within the body
  10. 16. major influence of the gradual inability to repair or recover from the external effect
  11. 17. sensations includes those for touch, pressure, vibration, etc.
  12. 18. neuron responsible for transmitting the nerve impulse
Down
  1. 1. system that releases chemical messengers in the form of hormones into the bloodstream
  2. 3. classified by their structural or functional characteristics
  3. 5. inherited inability to produce melanin
  4. 6. fast involuntary sequences of actions that occur in response to particular stimuli
  5. 11. detect changes in the nervous system
  6. 13. upward movement of the body part
  7. 14. gland responsible for regulating body temperature