Human Body Systems

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Across
  1. 8. System that consists of brain and spinal cord
  2. 10. System that breaks down food and absorbs nutrients
  3. 11. System that consists of lungs, nose and bronchi
  4. 12. System that fights off foreign invaders in the body
  5. 14. System that allows organisms to reproduce
  6. 16. System that consists of bones and provides shape/support
  7. 17. Largest organ in the human body
  8. 18. System that regulates body activities using hormones
Down
  1. 1. Structures that produce hormones
  2. 2. System that transports materials to and from cells
  3. 3. System that consists of hair, skin, and nails
  4. 4. A stable internal environment
  5. 5. Type of muscle that is located around all organs
  6. 6. System that removes waste from the body
  7. 7. Largest level of organization
  8. 9. Type of muscle that surrounds the heart
  9. 13. System that allows movement by contracting muscles
  10. 15. Smallest level of organization