Biology for kids

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Across
  1. 2. - Main organ of the respiratory system
  2. 4. - The jelly-like substance that fills the cell
  3. 6. MEMBRANE - The skin of a cell
  4. 7. - The process by which plants use sunlight, water, and carbon dioxide to create food
  5. 10. - Main organ of the circulatory system
  6. 13. - The process by which living things take in oxygen and release energy
  7. 15. - Tiny structures in the cell that are sometimes called the "powerhouses" of the cell
  8. 16. - Control center of the nervous system
  9. 17. - The soft part of the body
  10. 18. BLOOD CELL - The type of blood cell that fights infection
Down
  1. 1. CORD - Part of the nervous system that runs down the back of the body
  2. 2. - Main organ of the digestive system
  3. 3. - The control center of a cell
  4. 5. - The hard part of the body that protects the internal organs
  5. 8. - Part of the digestive system where food is broken down
  6. 9. - Part of the digestive system where nutrients are absorbed from food
  7. 11. - The molecule that holds the genetic instructions for an organism
  8. 12. - Main organ of the urinary system
  9. 14. BLOOD CELL - The type of blood cell that contains hemoglobin, a protein that carries oxygen through the bloodstream