1.
System The body's defense against harmful germs.
2.
A foreign substance that triggers an immune response.
3.
A protein that helps fight infections.
4.
The body's first line of defense against infections.
5.
A specialized immune response that remembers past infections.
6.
White blood cells that help fight infections.
7.
White blood cells that make antibodies.
8.
Shots that help the body develop immunity to diseases.
9.
Nerve cells that detect changes in the environment.
10.
Nerve cells that control movement.
11.
When plants grow towards light.
12.
When plants move in response to touch.
14.
A quick automatic response to a stimulus.
15.
A germ that causes disease.
