Muscular, skeletal, circulatory, nervous, respiratory systems

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Across
  1. 3. the brain and the spinal cord
  2. 5. contain elastic tissue that allows them to inflate and deflate without losing shape
  3. 9. what system accounts for 20% of our body weight
  4. 10. a short loop from the heart to the lungs and back again
  5. 12. the hardest working muscle
  6. 16. brings oxygen to the body and sends carbon dioxide out
  7. 17. contains over 600 muscles
  8. 18. oxygen, nutrients, and hormones to cells, removes waste product.
  9. 19. the nervous that go through the whole body
  10. 21. the formation of blood cells
Down
  1. 1. viens carry blood to the ____
  2. 2. The central nervous system and the peripheral nervous system are both part of the___
  3. 4. pull on joints
  4. 6. sense that help us perceive and understand the world
  5. 7. bones provide a rigid frame work known as the ___
  6. 8. this short tube contains a pair of vocal cord which vibrate to create sound
  7. 11. bones and muscles work together to create ___
  8. 13. the smallest muscle is located where?
  9. 14. carries blood from the heart to all the parts of the body and back again
  10. 15. carry blood away from the heart
  11. 20. carries both food and air