Across
- 4. Which structures are smaller branches of the bronchi that lead to the alveoli?
- 6. What is the structure for gaseous exchange in?
- 7. What is the process by which cells engulf and ingest foreign particles or microorganisms?
- 12. What type of muscle tissue surrounds the bronchi and bronchioles, allowing for changes in diameter?
- 14. What is uncontrolled cell growth?
- 15. A widespread outbreak of an infectious disease across multiple countries or continents is known as what?
Down
- 1. What are microscopic organisms that can cause disease?
- 2. What are signaling molecules that regulate immune responses?
- 3. Which disease is caused by the human immunodeficiency virus (HIV)?
- 5. What structures branch off from the trachea and lead to the lungs?
- 8. Which type of tissue provides structural support to the trachea and bronchi?
- 9. Which white blood cell is a specialized eater?
- 10. The ability of the body to resist infection and disease is known as what?
- 11. Which white blood cell is the first responder?
- 13. What is the process of introducing a weakened pathogen to stimulate immunity?