Organ Systems

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Across
  1. 1. lymph vessels are filled with this fluid
  2. 4. system of all the body’s defense systems
  3. 7. a function of the skeletal system
  4. 8. system's control is slow, long duration
  5. 13. gas exchange occurs at these sacs
  6. 14. the heart is this system's main structure
  7. 15. male gonads
  8. 16. trachea and lungs are part of this system
  9. 17. lymph ___ act as small filters
  10. 18. System with bones and joints
  11. 19. name of the heart muscle
  12. 20. system where the waste product is urine
  13. 21. main structures of the endocrine system
  14. 22. A group of organs
Down
  1. 2. secreted directly into the blood
  2. 3. System functions by nerve _______.
  3. 4. System with skin as its only organ
  4. 5. function: continuous movement of o2 & co2
  5. 6. teeth and salivary glands are ____ organs
  6. 9. Lympatic functions: transportation & ____
  7. 10. female gonads
  8. 11. balance of body’s internal environment
  9. 12. type of muscle we can control
  10. 14. made up of the brain and spinal cord