Cells and Body Systems

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Across
  1. 3. White blood cells help fight this.
  2. 5. This gas is transported by red blood cells to the body cells.
  3. 7. This is a protein that helps red blood cells carry oxygen.
  4. 8. Plant cells have this around their cells to help them stand up.
  5. 9. The largest artery in the human body.
  6. 10. The main organ of the respiratory system.
Down
  1. 1. You breathe this gas out.
  2. 2. The powerhouse of the cell.
  3. 4. Makes energy from sunlight in plant cells.
  4. 6. The main organ of the circulatory system.