TV Presenting can be a tough career to break into and can be very competitive, our video guide will give you some essential tips to show you how to become a Presenter and help maximise your chances of success.
White blood cells known as lymphocytes arise from by mitosis of stem cells in the bone marrow. Some lymphocytes migrate to the thymus and become T cells that circulate in the blood and are associated with the lymph nodes and spleen.
Lymphocytes are a type of white blood cell, which are an important part of the immune system. Lymphocytes can defend the body against infection because they can distinguish the bodyâs own cells from foreign ones. Once they recognize foreign material in the body, they produce chemicals to destroy that material.