Dendritic Cells (Langerhans Cells)
specialized white blood cells that ingest foreign invaders and activate the immune system
Dendritic cells (Langerhans cells) are a type of immune cell that plays a crucial role in the initiation and regulation of immune responses. They are present in various organs and tissues of the human body, most notably in the skin, respiratory tract, and lymphoid tissues.
The main function of dendritic cells is to recognize and capture foreign substances or antigens, such as bacteria, viruses, and tumor cells, that invade the body. Once captured, they process the antigen and present it to other immune cells such as T cells and B cells, which then initiate an immune response against the antigen.
Dendritic cells are also important in maintaining immune tolerance by presenting self-antigens to T cells in order to prevent autoimmune reactions. Additionally, they play a role in coordinating immune responses against tumors and infectious agents.
Langerhans cells are a specific type of dendritic cell found in the skin and mucosal tissues. They play an important role in the development of skin immunity and are able to recognize and respond to a wide range of antigens.
Overall, dendritic cells are a critical component of the immune system and their dysfunction can lead to immune disorders and diseases such as autoimmune diseases, allergies, and cancer.
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