What is the largest organ in the human body?

The largest organ in the human body is the skin. This organ serves multiple vital functions, including protection, regulation of temperature, sensation, and the synthesis of vitamin D. The skin is composed of three main layers: the epidermis, dermis, and subcutaneous tissue, which together provide a barrier against environmental hazards such as pathogens and harmful chemicals, while also helping to regulate body temperature through sweat and blood flow.

In terms of surface area and weight, the skin surpasses all other organs, making it the most extensive organ system in the body. Other organs might perform essential functions, like the liver in detoxification and metabolism, the kidneys in filtration and waste elimination, and the heart in circulation, but none of them exceed the skin in size. This unique status as the largest organ highlights the importance of skin health and its role in overall well-being.