Answer :

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The skin is one of the first defense mechanisms in your immune system. Tiny glands in the skin secrete oils that enhance the barrier function of the skin. Immune cells live in the skin and provide the first line of defense against infections.
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Answer:

The skin produces sweat and oil

The skin acts as a barrier

The skin produces mucus

Explanation:

Goblet cells in the epidermis produces mucus which helps to prevent bacteria from entering.

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