What does the immune system protect the body against? changes of the internal body temperature changes in the temperature of environment changes caused by harmful pathogens changes in the pH of the blood

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ciqarz

Answer:

changes caused by harmful pathogens

Explanation:

The immune system is the body's defense system. It protects the body from things that can harm it such as bacteria, viruses, fungi, and toxins.

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Answer:

its c

Explanation: