Body systems

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Across
  1. 3. A group of cells
  2. 5. which system process the food and make it into energy?
  3. 8. The oxygenated blood goes throw this part to get to the body.
  4. 10. tiny air in the lungs carbon dioxide is exchanged with oxygen
  5. 11. thick blue lines that carry blood from the body back to the heart
  6. 13. specialized nerve cells
Down
  1. 1. point at which two bones meet
  2. 2. we have 650 _____ in our body.
  3. 4. is the exchange of gases between your body and the air
  4. 6. is a soft tissue in the center of some bones
  5. 7. a fluid made by the salivary glands that softens and moistens the food.
  6. 9. a group of cells or an organ that secrets a substance
  7. 12. What do you use to breath with.