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They help protect the body by attacking invaders.
the body protect itself when such an accident happen by it's recovering materials that can protect it from any accident .
Firstly if your body gets infected with an unknown pathogen then it will build a memory so next the pathogen that infect the body will automatically eliminated and second how the body gets rid of the pathogen is by sending antibodies or whiteblood cells to kill the invaders
You body agglutinates blood in order to protect / repair against bacterial invaders.
The ability of the body to protects itself from its environment is called homeostasis.
by wings
scales
body mass
You might protect your city-state from invaders by creating and maintaining a well-trained standing army. You might also create fortifications to block invaders.
There shells.
their claws
What does a mollusk use to protect itself? Most have shells