Body Systems Crossword

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Across
  1. 3. Where the blood and lungs exchange oxygen and carbon dioxide
  2. 5. Muscle below the lungs that contracts to help breathing
  3. 6. Proteins that protect you from antigens
  4. 7. The main artery that carries oxygenated blood from the heart to the rest of the body
  5. 8. Proteins that help speed up chemical reactions in our body
  6. 11. The organ where nutrients are absorbed and sent to the bloodstream
  7. 13. Stimulates the body's immune response against diseases
  8. 14. Liquid part of blood, takes nutrients
  9. 15. An organ that produces digestive enzymes and insulin, which regulates blood sugar levels.
  10. 17. The process of inhaling oxygen and exhaling carbon dioxide
  11. 18. Major organ of the respiratory system
Down
  1. 1. Made in the bone marrow, contains hemoglobin
  2. 2. These are in our blood stream and help fight infection
  3. 3. Blood vessel that carries oxygenated blood
  4. 4. To be totally or partially resistant to pathogen or disease
  5. 9. nerve cells that send messages all over the body
  6. 10. The body's response to injury or infection, characterized by redness, swelling, heat, and pain.
  7. 11. Connects the brain to the lower back and sends signals through the body
  8. 12. The part of the brain that stores memory
  9. 16. Largest part of the brain