Answer :
Final answer:
Sebum, produced by sebaceous glands, lubricates, and protects the skin from dehydration and microbial threats.
Explanation:
Sebum is an oily substance secreted by sebaceous glands that serves to lubricate and protect the skin from drying out and microbial infections. It acts as a barrier to water loss and has antibacterial properties, inhibiting the growth of microorganisms on the skin.
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