This is the body's largest organ - an important barrier to germs.

This liquid in the mouth contains enzymes that break down food and destroy
some pathogens.

This large white blood cell devours some pathogens.

These substances, which are either injected or taken by mouth, prevent a person from becoming ill with certain
diseases.

These are the soft, wet tissues that line certain body opening.

This harsh liquid in the stomach breaks down food and destroys some pathogens.

This type of white blood cell manufactures antibodies to help the body resist disease-bearing germs.

These are medicines for diseases caused by certain bacteria.

This is the name for germs that can cause disease.

This liquid, produced by the skin, traps some pathogens.

This category of white blood cells has many cells that regulate the immune system.

This is a type of pathogen. It cannot be treated with antibiotics.

This is another word for pathogen.

A. These liquids, produced by the eyes, trap some pathogens and contain enzymes that kill bacteria.

This type of T-cell assists other T-cells and macrophages to destroy pathogens by giving them the signal to start.

This is a virus that eventually impairs the immune system.

These are tiny hair-like structures that cover some cells. In the nose and ears, these structures catch some pathogens and "sweep" them back out of the body.

This is the sticky coating of the membranes that line body openings such as The nostrils (nose).

This type of T-cell tells other T-cells and macrophages when to stop attacking pathogens.

This is a group of bodily signs and symptoms and illness that people whose immune systems have been seriously impaired or compromised by HIV infection/disease sometimes get.