Communicable Diseases

2. A microorganism that infects the digestive system
3. A specialized white blood cell that coordinates and performs many functions of specific immunity
5. A disease that is spread from one living organism to another or through the environment
7. An organism that carries and transmits pathogens to humans or other animals
8. a viral infection of the respiratory tract
10. A yellowing of the skin and eyes
14. Single-celled microorganisms
16. Symptoms include sore throat, fever, and enlarged lymph nodes in the neck.
17. An infection of the lungs in which the air sacs fill with pus and other liquids
18. Substances that kill cells or interfere with their functions
19. A piece of genetic material surrounded by a protein coat
20. A reaction to tissue damage caused by injury or infection
22. A condition that occurs when pathogens in the body multiply and damage body cells

1. The passageway that makes breathing possible
4. A network of cells, tissues, organs, and chemicals that fights off pathogens
6. A global outbreak of an infectious disease
7. A preparation of dead or weakened pathogens that are introduced into the body to stimulate an immune response
9. a viral infection that causes inflammation of the liver
11. A protein that acts against a specific antigen
12. A disease outbreak that affects many people in the same place and at the same time
13. The lining of various body cavities, including the nose, ears, and mouth
15. Scarring of the liver
18. a bacterial disease that usually attacks the lungs
20. The state of being protected against a particular disease
21. Substances that can trigger an immune response