T Lymphocytes vs B Lymphocytes
In the blood, there are cells and plasma. The main two types of cells are Red Blood Cells (RBC) and White Blood Cells (WBC). RBC is mainly for carrying the oxygen and WBC is for defence mechanism. Again there are two types in white blood cells. The cells that contain granules in the cytoplasm (granulocytes) and that not having granules in the cytoplasm (agranulocytes). Granulocytes also divided in to two; lymphocytes and monocytes. Lymphocytes are similar in appearance, but they have different functions. According to the functions, lymphocytes are divided in to T lymphocytes and B lymphocytes. Both are important to fight against the infections. The T lymphocytes will mature in thymus. B lymphocytes are mainly in the lymph nodes. T lymphocytes can kill the infected cells (Cyto toxic). Some of the T lymphocytes are helper cells.
B lymphocytes usually secrete the antibodies. The antibodies will neutralize the antigen. Antibodies are specific to the infection. That means different infections will produce different antibodies. The B cells can secrete antibodies when it is activated. When B cells are secreting antibodies, it will be named as plasma cells.
Lymphocytes count usually increased in viral infections and TB infection.
Lymphocytes will be in the blood and lymphatic tissues to identify the foreign invaders to the body.
- Both T lymphocytes and B lymphocytes are white blood cells. They are agranulocytes (no granules in the cytoplasm). They are the specific immune responders (the immune system can identify the invaders and attack). Both are produced by the bone marrow but mature in different places.
- T lymphocyte can kill the infected cell (Cyto toxic / cell medicated immunity) B lymphocytes produces antibodies which attack the antigens.
- T lymphocytes mature in thymus; B Lymphocytes are in the nodes.
- HIV infection will target the T lymphocytes and destroy it.
- In viral infection lymphocyte counts will be increased.