human body review

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Across
  1. 2. finger-like structure that cover the inside of the small intestine where the food is digested
  2. 3. made of cells that all do a specific function
  3. 4. tiny sacs in the lung that exchange gases between the air and blood
  4. 6. directs air to the lungs
  5. 7. found in the kidney acts as a filter blood goes through
  6. 8. filters blood from things like urea, water, salt, and proteins
  7. 10. lets air pass from and to the lungs (also called windpipe)
  8. 11. passage in the lungs that lead from the bronchi to alveoli
  9. 12. basic unit of life
  10. 13. a muscule at the bottom of the chest that helps you breathe
  11. 15. carries blood away from the heart
Down
  1. 1. liquid part of the blood
  2. 2. takes blood to the heart
  3. 5. the lower part of the heart
  4. 9. muscular tube that connects the mouth and stomach
  5. 11. stores urine
  6. 14. the upper part of the heart