Science cross word

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Across
  1. 2. The circulatory system includes vessels
  2. 3. it takes about 20 sec for a red blood cell to circle the whole body
  3. 5. the are the main part of your respiratory system
  4. 6. A is what your body dose
  5. 9. The beats 3 billion in the average persons life
  6. 12. directs air to the lungs
  7. 13. When food leaves your esophagus it enters the
  8. 14. Supports the body and protects your organs
  9. 15. The skeletal system produces
  10. 16. The human body has about muscles in your head and neck
  11. 18. intestine the is part of the digestion
Down
  1. 1. may live fore about 4 months to circle your body
  2. 3. The skeletal consists of 206
  3. 4. neuron A sends a impulse to a muscle or gland
  4. 7. The is the main part of a human body were most muscle are located
  5. 8. A buzzing fly is a
  6. 10. the filters the gases for oxygen
  7. 11. attach to bones
  8. 17. Is a substance that breaks up fat particals