Organ Systems

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Across
  1. 2. Controls our nervous system.
  2. 6. The smallest unit of the nervous system.
  3. 8. They protect the organs of our bodies.
Down
  1. 1. Connect arteries and veins.
  2. 3. Whitish fibers of connective tissue that attach skeletal muscles to bones.
  3. 4. Contains and digests food.
  4. 5. Remove the carbon dioxide from the blood and refill it with oxygen.
  5. 7. Protects the heart and lungs.