Systems Review

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Across
  1. 3. Benjamin __________ proved that lightning is electricity
  2. 4. connects the mouth to the stomach
  3. 7. invented by A.V Leeuwenhoek
  4. 9. organ in our body where exchange of gases take place
  5. 10. enables us to move our body parts
Down
  1. 1. a set of bones that protect our brain
  2. 2. Food is broken down into simple substances
  3. 5. Robert __________ discovered plant cells
  4. 6. basic unit of all living things
  5. 8. made up of parts that work together