The skin, the largest organ of the human body, serves as a remarkable and multifaceted interface between our internal environment and the external world. Comprising three primary layers—epidermis, dermis, and subcutaneous tissue—this intricate organ not only provides a protective barrier but also plays a vital role in sensory perception, temperature regulation, and immune defense. The outermost layer, the epidermis, acts as a shield against external threats, such as harmful microbes .
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