What is the largest organ of the human body?

The largest organ of the human body is indeed the skin. It serves multiple essential functions, including protection, regulation of body temperature, and sensation. Covering an average adult body, the skin has a surface area of about 1.5 to 2 square meters and constitutes approximately 15% of total body weight.

Unlike the liver, heart, and lungs, which are internal organs, the skin is the outer layer that acts as a barrier against pathogens and environmental elements. It also plays a crucial role in preventing dehydration and synthesizing vitamin D when exposed to sunlight. Given its vast coverage and vital functions, skin is classified as the largest organ, surpassing all other organs in terms of size and surface area.