Unit 2 Crossword Puzzle

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Across
  1. 1. A push or a pull
  2. 3. The force of attraction between two objects
  3. 5. Major organ in the Respiratory System
  4. 9. System; supplies oxygen and CO2
  5. 10. Pumps blood throughout body
  6. 11. Tubes that carry blood
Down
  1. 2. System; transports blood
  2. 4. A fluid that carries gases around body
  3. 6. System; all bones in the human body
  4. 7. Means to breathe
  5. 8. Groups of organs that work together