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What is the largest organ in the human body and what does it do?
Updated: 11-Apr-2025

The skin is the largest organ in the human body. It covers about 2 square meters in an average adult and serves as the first line of defense against environmental threats. It protects internal organs, regulates body temperature, and enables sensations like touch, pressure, and heat.

Skin consists of three layers: the epidermis (outer), dermis (middle), and hypodermis (inner). It also plays a key role in producing vitamin D when exposed to sunlight. Proper skincare, hydration, and protection from harmful UV rays are crucial to maintaining skin health and preventing conditions like infections and cancer.

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