The receptors match only one specific antigen. White blood cells called lymphocytes originate in the bone marrow but migrate to parts of the lymphatic system such as the lymph nodes, spleen, and thymus. There are two main types of lymphatic cells, T cells and B cells.nce activated, helper T cells start to divide and to produce proteins that activate B and T cells as well as other immune cells. The killer T cell is specialized in attacking cells of the body infected by viruses and sometimes also by bacteria. It can also attack cancer cells.
Use tubercular in a sentence. 1  of, like, or having a tubercle or tubercles. 2  of, relating to, or having tuberculosis. 3  caused by the tubercle bacillus.
Circulatory System = carries blood and dissolved. substances to and from various places in the body. Heart = pumps blood with various substances in it around. the body in tubes called vessels. The heart, blood vessels, and blood together make. up the Circulatory System. What is the circulatory system? Vessels = tubes carrying blood throughout body; 3 types: arteries, capillaries, veins. Blood = liquid carrying gases, nutrients, blood cells, and. chemicals to and from various places in the body.