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