Science crossword

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Across
  1. 3. What does the digestive system absorb?
  2. 5. What does the immune system defend against?
  3. 7. What does the respiratory system absorb?
  4. 11. What does the endocrine system release?
  5. 12. What are body systems made of?
  6. 14. What is the largest organs body system?
  7. 15. What does the circulatory system transport?
Down
  1. 1. What body system is the brain apart of?
  2. 2. What does the lymphatic system fight?
  3. 4. What body system is the femur apart of?
  4. 6. What body system is the biceps brachii apart of?
  5. 8. Which body system are the kidneys apart of?
  6. 9. What does the heart do to blood?
  7. 10. What does the excretory system get rid of?
  8. 13. What does the skeletal system provide?