Saturday, October 26, 2013

Lymphocytes in the Immune System

The Benefits of Lymphocytes in the Immune System

benefits of Lymphocytes

benefits of Lymphocytes in the Human Immune System

Lymphocytes are types of white blood cells that are part of the immune system. Recognize the role of lymphocytes involves harmful particles, or antigens, and implement processes to deal with them.

There are different types of lymphocytes, known as T cells, B cells and natural killer cells, the role of each cell varies. T cells and natural killer cells to destroy harmful cells and some T cells activate other immune cells. B cells produce antibodies, and both B and T cells creates memory cells that remember the threat.

Lymphocytes are produced in the bone marrow before traveling to areas of the lymphatic system such as the spleen, thymus and lymph nodes. Appearance as well as the role of lymphocytes may vary. A T cell or B cell is an example of what is called agranular cells, in which the gel that fills the cell cytoplasm or a clear and spherical nuclei. Natural killer cells are large granular lymphocytes, with visible granules contained in the cytoplasm and nucleus lobe.

B cells and T cells have receptors on their surface that recognize a specific antigen. This antigen can be anything that threatens the body, such as viruses, bacteria, allergies or toxic molecules. Role of lymphocyte natural killer cell type specific and they are not able to recognize different types of antigens, including some infected cells and tumor cells.

T lymphocytes can be subdivided into helper cells and killer T cells. T helper cells have what is probably the most important role of lymphocytes in the immune system. They activate the immune cells of the body, including the killer T cells and B cells The main role of killer T cells is to destroy cells that have been infected by the virus. They also can attack cancer cells and cells that have been infected by the bacteria.

B lymphocytes become activated when they bind to their specific antigen. Then they are divided into two types of cells, known as memory cells and plasma cells. One important role of lymphocytes is the production of antibodies, and plasma cells that are responsible for this. They can quickly produce and release antibodies into the thousands of blood circulation, ready to stick to the antigen.

Some antigens, such as viruses, can be neutralized when the antibodies attached to them. A coating antigen antibodies can also be made ​​more attractive to cells called phagocytes, which then can devour and destroy. Other types of cells are produced by B lymphocytes, memory cells, since antigen so that the body can respond more quickly if they invade again.

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