What type of cells help protect the body from infections in the skin?

Langerhans cells play a crucial role in the immune defense of the skin. They are specialized dendritic cells located within the epidermis and are essential for protecting the body from infections. These cells function as antigen-presenting cells, meaning they can capture and process foreign invaders, such as bacteria and viruses, and then present these antigens to T-cells in the immune system to initiate an immune response. This ability allows the body to recognize and fight off infections effectively.

Keratinocytes primarily form the structural component of the skin, providing a barrier to physical and environmental damage, but they do not directly participate in the immune response. Melanocytes are responsible for pigment production in the skin, contributing to protection against UV radiation but not specifically to infection defense. Fibroblasts contribute to the skin's structural integrity and healing processes but do not play a direct role in immune responses. Thus, Langerhans cells are recognized as the key players in the skin's immune response, making them the correct answer to the question.