Biology

123456789101112131415
Across
  1. 4. Which structures are smaller branches of the bronchi that lead to the alveoli?
  2. 6. What is the structure for gaseous exchange in?
  3. 7. What is the process by which cells engulf and ingest foreign particles or microorganisms?
  4. 12. What type of muscle tissue surrounds the bronchi and bronchioles, allowing for changes in diameter?
  5. 14. What is uncontrolled cell growth?
  6. 15. A widespread outbreak of an infectious disease across multiple countries or continents is known as what?
Down
  1. 1. What are microscopic organisms that can cause disease?
  2. 2. What are signaling molecules that regulate immune responses?
  3. 3. Which disease is caused by the human immunodeficiency virus (HIV)?
  4. 5. What structures branch off from the trachea and lead to the lungs?
  5. 8. Which type of tissue provides structural support to the trachea and bronchi?
  6. 9. Which white blood cell is a specialized eater?
  7. 10. The ability of the body to resist infection and disease is known as what?
  8. 11. Which white blood cell is the first responder?
  9. 13. What is the process of introducing a weakened pathogen to stimulate immunity?