Human Body Systems

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Across
  1. 2. A body system that sends messages through the body using electrical signals
  2. 5. A body system that provides internal structure and protects delicate organs
  3. 8. A body system that breaks down food to absorb nutrients into the bloodstream
  4. 9. A cartilaginous tube that lets air into the lungs
  5. 11. An organ that filters wastes out of the blood to create urine
  6. 14. A body system that uses blood to move oxygen and nutrients to each cell in the body
  7. 16. An organ near the heart that is primarily responsible for the production and maturation of immune cells
  8. 18. A cell that uses an action potential to send electrical signals to organs
  9. 19. A body system that creates cells that join to make new offspring
  10. 21. Organ in the inflates to bring in oxygen
  11. 24. A hard connective tissue made from protein and calcified cells
  12. 26. A body system that sends chemical signals called hormones to other organs in the body
  13. 31. A body system that covers the body in skin, hair, and nails
  14. 32. Organ that pumps blood
  15. 33. Food travels down this elongated tube to enter the stomach
Down
  1. 1. An organ made of contractile tissues
  2. 3. The external part of the ear
  3. 4. Small, mineralized tissues in the mouth that aids in mechanical digestion
  4. 6. A sensory organ in charge of sight
  5. 7. A strong digestive organ in the mouth that aids in swallowing
  6. 10. A body system that removes liquid wastes and regulates the amount of water in the body
  7. 12. A muscular organ that contracts to inflat the lungs
  8. 13. A body system that works to fight disease
  9. 15. An organ that breaks down proteins and fats using digestive enzymes
  10. 17. The largest organ in the human body, and its first line of defense
  11. 20. A series of tubing in the abdomen that absorbs nutrients during digestion
  12. 22. An organ that makes white blood cells that fight infection
  13. 23. An organ that detoxifies the blood and removes old red blood cells
  14. 25. A flap of tissue that closes over the trachea to prevent food from entering the airway
  15. 27. The external part of the nose
  16. 28. A body system that brings oxygen into the body and removes carbon dioxide
  17. 29. A body system that creates movement
  18. 30. An organ of the central nervous system that controls how we learn, think, and feel