What is the main job of our immune system?

Which of these is a product of bacteria that can damage teeth?

Which decomposer is used to make antibiotics such as penicillin?

Full of nutrients

Able to cause disease

An organism that reproduces inside the cells of another life-form

A "fuzzy" kind of fungus

Substances produced by the body to destroy germs.

The living tissue of a tooth.

A hole in a tooth caused by bacteria.

A substance produced by bacteria.

What the body uses to protect itself against illnesses.

A single-celled decomposers

Too small to see without a microscope