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Lymphocytes
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- T cells are a type of white blood cell called lymphocytes. They help your immune system fight germs and protect you from disease. There are two main types. Cytotoxic T cells destroy infected cells. Helper T cells send signals that direct other immune cells to fight infection.
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T cells are a type of white blood cell that help your immune system fight germs and protect you from disease. There are two main types: cytotoxic and helper T cells.
2 days ago · T cell, type of leukocyte (white blood cell) that is an essential part of the immune system. T cells are one of two primary types of lymphocytes—B cells being the second type—that determine the specificity of immune responses to antigens (foreign substances) in the body.
- The Editors of Encyclopaedia Britannica
T cells are one of the important types of white blood cells of the immune system and play a central role in the adaptive immune response. T cells can be distinguished from other lymphocytes by the presence of a T-cell receptor (TCR) on their cell surface. T cells are born from hematopoietic stem cells, [1] found in the bone marrow.
- Regina Bailey
- Macrophages. Monocytes are the largest of the white blood cells. Macrophages are monocytes that are present in nearly all tissue. They digest cells and pathogens by engulfing them in a process called phagocytosis.
- Dendritic Cells. Like macrophages, dendritic cells are monocytes. Dendritic cells have projections that extend from the body of the cell that are similar in appearance to the dendrites of neurons.
- B Cells. B cells are a class of white blood cell known as a lymphocyte. B cells produce specialized proteins called antibodies to counter pathogens. Antibodies help identify pathogens by binding to them and targeting them for destruction by other immune system cells.
- T Cells. Like B cells, T cells are also lymphocytes. T cells are produced in bone marrow and travel to the thymus where they mature. T cells actively destroy infected cells and signal other immune cells to participate in the immune response.
Jun 9, 2021 · Definition. The white blood cell or leukocyte is an immune cell that protects the body from endotoxins, invading pollutants, bacteria, and viruses; this broad group of cells also removes dead or damaged cells. White blood cells are split into two main groups – granular and non-granular.
Feb 16, 2011 · T-Cells. T-cells are a type of white blood cell that work with macrophages. Unlike macrophages that can attack any invading cell or virus, each T-cell can fight only one type of virus. You might think this means macrophages are stronger than T-cells, but they aren’t.
Sep 11, 2024 · White blood cells (WBCs) are a part of your immune system that fight infection and defend the body against other foreign materials. There are five types of white blood cells: Neutrophils. Eosinophils. Basophils. Lymphocytes. Monocytes. Each type of white blood cell has a specific job. Some spot intruders and kill harmful bacteria.
