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(C) The human body has several innate immunity barriers to prevent the entry of pathogens.Physical barriers are the first line of defense.$1$. The $Sk

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Skin

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(C) The human body has several innate immunity barriers to prevent the entry of pathogens.Physical barriers are the first line of defense.$1$. The $Skin$ is the primary physical barrier that prevents the entry of microorganisms into the body.$2$. Mucus coating of the epithelium lining the respiratory, gastrointestinal, and urogenital tracts also helps in trapping microbes entering our body.Therefore, the $Skin$ is considered the most significant and primary physical barrier.

Which is the primary physical barrier in our body?

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