Across
- 3. Two spongy, saclike organs in the body that hold air while oxygen and carbon dioxide are exchanged.
- 4. Slippery secretion of the body that helps to moisten and protect certain body parts.
- 6. Small blood vessels that carry blood away from the heart.
- 8. Body tissue that is strong and somewhat elastic. It is found in the human nose, ears, back, and other areas.
- 10. The upper part of the trachea that houses the vocal cords.
- 12. The main trunk of the system of tubes that carry air into and out of the lungs. It connects the pharynx to the bronchi.
- 13. Highly contagious virus that causes fever, severe aches and pains, and progressive inflammation of the respiratory mucous membranes.
- 14. Tiny tubes that are branches of the bronchi.
- 17. Pieces of tissue in the back of the throat that fight infection by catching and killing germs.
- 19. Device worn over the mouth or nose to protect the respiratory system.
- 20. Tiny veins that connect capillaries with the larger system of veins.
Down
- 1. Smallest blood vessels of the body.
- 2. Little sacs that hold air in the lungs.
- 5. smoke Tobacco smoke that is inhaled by people near the smoker.
- 7. cells Small cells that line parts of the body.
- 9. Surgical process of cutting into the trachea through the skin so that a person can breathe.
- 11. Thin plate of flexible cartilage that folds over and covers the trachea during swallowing.
- 15. Tiny, hairlike projections that line the nose.
- 16. Part of the airway between the nose and the larynx.
- 18. The divisions of the trachea that carry air to and from the lungs during inhalation and exhalation.