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the skin is one of the first defense mechanisms in your immune system
Happy face or sad face​


Sagot :

Answer:

Happy face po

Hope it help

Answer:

Happy face

Explanation:

Skin, tears, and mucus are part of the first line of defense in fighting infection. They help to protect us against invading pathogens. You have beneficial bacteria growing on your skin, in your bowel, and in other places in the body that stop other harmful bacteria from taking over.