What is the largest organ of the human body?

The skin is the largest organ of the human body, covering an average area of about 1.5 to 2 square meters in adults. It plays a crucial role in protecting the body from external factors such as pathogens, chemicals, and physical damage. Additionally, the skin is involved in vital functions such as temperature regulation, sensation, and the synthesis of vitamin D.

In terms of composition, the skin consists of multiple layers, including the epidermis, dermis, and hypodermis, each performing specific functions that contribute to overall health and homeostasis. This multifunctionality and extensive coverage make the skin the most substantial organ when considering surface area and weight.

Other organs, such as the liver, heart, and brain, though significant in their respective functions, do not match the skin in terms of overall size and area. The liver, while the largest internal organ, does not encompass as much surface area as the skin. The heart and brain are also critical to bodily functions but are much smaller in terms of size compared to the skin.