Langerhans cells are specialized immune cells found in the skin and mucosal tissues. They play a crucial role in the body's defense system by detecting and capturing pathogens, such as bacteria and viruses. These cells are part of the immune system and help initiate an immune response by presenting antigens to other immune cells. These cells are named after the German physician Paul Langerhans, who discovered them in 1868. Langerhans cells are a type of dendritic cell, characterized by their unique shape and ability to migrate to lymph nodes. Their presence is essential for maintaining skin health and protecting against infections.