human body review

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Across
  1. 2. windpipe
  2. 5. fingure like that cover the inner surface of the small intestine
  3. 6. lower part of the heart
  4. 7. tissue working together
  5. 8. passage air to lungs
  6. 11. basic unit of life
  7. 12. blood vessel that brings blood away from the heart
  8. 14. upper part of the heart
Down
  1. 1. the start of digestion
  2. 3. tiny sacs
  3. 4. filters waste from the blood
  4. 8. stores urine
  5. 9. blood vessesl that brings blood back to the heart
  6. 10. the liquid part of blood
  7. 13. a group of cells working together