Specialized cells protect the human body from disease-causing microbes by

The immune system, which is made up of special cells, proteins, tissues, and organs, defends people against germs and microorganisms every day. In most cases, the immune system does a great job of keeping people healthy and preventing infections. But sometimes problems with the immune system can lead to illness and infection.

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Awoman and a man have sex by putting the man’s penis into the whole of the vagina of a woman

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