Body Systems

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Across
  1. 1. the smallest structural and functional unit of an organism
  2. 5. carry oxygenated blood
  3. 9. the middle layer of skin
  4. 10. type of ribs that connect to the false ribs
  5. 11. a material making up the body
  6. 12. carry deoxygenated blood
Down
  1. 2. the top layer of skin
  2. 3. keeps you alive
  3. 4. type of ribs that connect to the spine and sternum
  4. 6. a group of objects such as the cardiovascular system.
  5. 7. type of ribs connecting to the seventh rib.
  6. 8. an organ that helps you breath