the body protect itself when such an accident happen by it's recovering materials that can protect it from any accident .
The purpose of the body's immune system is to protect the body from harmful pathogens such as bacteria, viruses, and other foreign invaders. It does this by recognizing and attacking these invaders to prevent illness and infection.
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.
Antibodies are substances in the blood that help the body protect itself by identifying and neutralizing foreign invaders such as bacteria and viruses. White blood cells are also important as they defend the body against infections and foreign substances. Additionally, platelets play a role in blood clotting, which is crucial for wound healing and preventing excessive bleeding.
The ability of the body to protects itself from its environment is called homeostasis.
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body mass
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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.