Body Systems

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Across
  1. 5. bones are filled with a sponge substance called?
  2. 10. The average adult has between 10-__ liters of blood.
  3. 12. neurons are made of how many parts?
  4. 13. must vertebrate animals have two ___ to let them breathe?
  5. 17. The ___ systems main function is to provide oxygen to your body.
  6. 18. what neuron sends messages from one neuron to another.
  7. 19. the ____ system circulates blood around the body.
  8. 20. What controls the nervous system?
Down
  1. 1. The muscles on the front of your thighs.
  2. 2. what is the longest and strongest bone of the human skeleton?
  3. 3. your ___ system allows your body to communicate.
  4. 4. the place where two bones meet or connect.
  5. 6. The arteries carry ___ blood from the heart.
  6. 7. Located down under your rib cage.
  7. 8. sends messages from one neuron to another. no Are both lungs the same size?
  8. 9. the hands and ___ contain half of the human bodies bones.
  9. 11. the triangular muscles of the shoulder.
  10. 14. if you have a larger lung capacity your body transports oxygen ___.
  11. 15. The veins carry ____ back to the heart.
  12. 16. Found on each side of your upper chest.