What is the largest organ in the body?

The largest organ in the body is the skin. It serves multiple essential functions, including protection against environmental hazards, regulation of temperature, and sensory perception. Covering the entire external surface of the body, the skin is vital for maintaining overall health and plays a key role in immune response. It consists of multiple layers, including the epidermis, dermis, and subcutaneous fat, each contributing to its protective and regulatory capabilities. The extensive area covered by the skin, combined with its complex structure, makes it the largest organ.

The liver, while being one of the largest internal organs and crucial for metabolic functions, does not surpass the surface area of the skin. The heart is a critical muscular organ responsible for pumping blood but is far smaller in size than the skin. The brain, although highly complex and vital for cognitive functions, is also not as large in surface area or volume as the skin.