The world's largest organ is the skin. It serves as a protective barrier for the body, regulating temperature and preventing the loss of essential fluids. The skin also plays a crucial role in the immune system, acting as the first line of defense against pathogens. Additionally, it is involved in sensory perception, allowing us to feel touch, pain, and temperature. Skin is composed of multiple layers, including the epidermis, dermis, and hypodermis, each with distinct functions. Maintaining skin health is vital for overall well-being, as it reflects both physical and environmental factors.