Communicable Diseases

4. simple one-celled organism
6. the body's response to illness or disease, resulting in a condition of heat, pain, or swelling
9. a combination of body defenses made up of cells, tissues, and organs that fight pathogens in the body
10. cleanliness
11. one-celled organisms that are more complex that bacteria
14. the ability to resist the pathogens that cause a particular disease
15. the length of time that a particular disease can be spread from person to person
16. germs that cause diseases

1. a disease that can be spread from person to person from another person, animal, or object
2. organisms that are so small they can only be seen with a microscope
3. a preparation of dead or weakened pathogens that is introduced into the body to cause an immune response
5. the smallest and simplest pathogen
7. any condition that interferes with the normal or proper functioning of the body or mind
8. a secondary circulatory system that helps the body fight infection and maintains fluid balance
12. organisms that are more complex than bacteria but cannot make their own food
13. a condition that happens when pathogens enter the body, multiply, and cause harm