Question

With reference to immune system there are two types of lymphocytes-T-cells and B-cells. Why are these so-named and what is their respective function ?

Answer 1

• 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.