Body Systems

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Across
  1. 3. The body's internal framework that supports and protects organs
  2. 7. Muscle tissue found only in the heart
  3. 10. Mineral important for strong bones
  4. 11. A hard connective tissue that makes up the skeleton
  5. 13. The largest organ of the body
  6. 14. Pigment that gives skin its color
  7. 15. Blood vessel that carries blood toward the heart
  8. 18. Fluid produced to help cool the body
  9. 20. Fluid transported by the lymphatic system
  10. 23. Tissue that connects muscle to bone
  11. 24. Liquid portion of blood
  12. 27. Gas needed for cellular respiration
  13. 29. Protective protein found in skin, hair, and nails
  14. 30. The place where two bones meet
  15. 31. The outer layer of skin
  16. 34. The inner layer of skin containing glands and nerves
Down
  1. 1. Blood vessel that carries blood away from the heart
  2. 2. Main organs of respiration
  3. 4. Tube that carries air to the lungs
  4. 5. Waste gas removed from the body during exhalation
  5. 6. Thin protein filament involved in contraction
  6. 8. Tiny blood vessel where exchange occurs
  7. 9. Tiny air sacs where gas exchange occurs
  8. 12. Voluntary muscle attached to bones
  9. 16. The longest bone in the human body
  10. 17. Soft tissue inside bones where blood cells are produced
  11. 18. Muscle appearance with visible stripes
  12. 19. Largest artery in the body
  13. 21. Oxygen-carrying protein in red blood cells
  14. 22. White blood cell involved in immunity
  15. 25. Thick protein filament involved in contraction
  16. 26. Muscular organ that pumps blood
  17. 28. Muscle that helps breathing
  18. 32. Involuntary muscle found in internal organs
  19. 33. Structure that prevents backflow of blood