Match the following.

1. a fluid secretion of the body membranes or linings mucus
2. a chemical produced by microorganisms that can destroy other bacteria and microorganisms infectious
3. a body condition characterized by yellowness of the skin antibiotic
4. an organism too small to be seen except with a microscope jaundice
5. spread by infection; causing infection; apt to spread bacteria
6. tiny single-celled organisms that do not have a nucleus microorganism