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.
The circulatory system is a network of specialized tubes (known as blood vessels) that carry oxygen-and nutrient-rich blood to the organs and tissues of the body. There are 3 types of blood vessels: arteries, veins, and lymphatics.AD is a medical condition caused by blockages of the arteries that provide blood flow to the arms or legs. You may have also heard of this problem referred to as peripheral vascular disease (PVD) or âbad circulation.â In PAD, the arteries become blocked by cholesterol plaque caused by atherosclerosis.