Across
- 3. dioxide The primary waste gas released during exhalation.
- 5. A chronic respiratory disease that causes narrowing of the airways.
- 7. Hair-like structures on cells that help move mucus and trapped particles out of the airways.
- 8. The part of the circulatory system that delivers oxygenated blood to the body's tissues.
- 10. A gas that makes up the majority of inhaled and exhaled air but is not involved in gas exchange.
- 12. The protein in red blood cells that binds oxygen for transport in the bloodstream.
- 15. A lung condition that damages alveoli, reducing oxygen absorption.
- 17. The process by which gases move from areas of high concentration to low concentration, such as oxygen moving from the alveoli to the blood.
- 20. The system that transports oxygenated blood from the lungs to the body and returns deoxygenated blood to the lungs for gas exchange.
- 23. The windpipe that directs air to the lungs.
- 24. The process of expelling air from the lungs after gas exchange has occurred.
- 26. Tiny sacs in the lungs where gas exchange occurs.
- 28. The cells responsible for gas exchange in the alveoli.
- 30. Small openings on plant leaves that allow for gas exchange, similar to alveoli in the lungs.
- 31. An alternative entry point for air, where it is filtered and humidified.
- 32. cells The specialized cells that regulate the opening and closing of stomata in plants, similar to the way respiratory muscles control air entry in animals.
- 33. The flap of tissue that prevents food from entering the trachea during swallowing.
- 35. The cells lining the respiratory tract that produce mucus to trap particles.
Down
- 1. The process of gases (oxygen and carbon dioxide) moving between the alveoli and the blood.
- 2. The smaller airways branching off the bronchi in the lungs.
- 4. The voice box that also acts as a passage for air entering the trachea.
- 6. The exchange of gases between the air in the alveoli and the blood in the capillaries.
- 9. The process of air entering the body through the mouth or nose and traveling down the trachea to the bronchi and bronchioles.
- 11. The muscles between the ribs that assist in breathing by expanding and contracting the chest cavity.
- 13. The entry point for air into the respiratory system.
- 14. pressure The measurement of oxygen and carbon dioxide concentrations that drive diffusion in the lungs.
- 16. The movement of air into and out of the lungs, including both inhalation and exhalation.
- 18. Small blood vessels surrounding the alveoli, where oxygen enters the blood and carbon dioxide is removed.
- 19. The part of the throat that connects the mouth to the esophagus and trachea.
- 21. The membrane that surrounds the lungs and lines the chest cavity to reduce friction during breathing.
- 22. The muscle that contracts to pull air into the lungs.
- 25. The primary gas absorbed by the body during inhalation.
- 27. The two large airways that lead from the trachea to the lungs.
- 29. cavity The area behind the nose where air is warmed and filtered before it enters the lungs.
- 34. The primary organ for gas exchange in the respiratory system.