THE LAND: Afghanistan is known for it's mountainous terrain. The huge Hindu Kush mountains form a barrier between the Northern provinces and the rest of the country. This mountain range has also divided Afghanistan int three very different geographic regions known as; The Central Highlands, The Northern Plains, and the Southwestern Plateau.
â Antibody producing B cells develop into plasma cells â¢ Plasma cells only found in lymphoid organs, not in general circulation or lymph â¢ eccentric nuclei and perinuclear halo (clear region under nucleus) â Clonal expansion leads to development of effector cells or memory cells for both T and B events. Memory cells can survive 20 years or
Medical Definition of B cell. B cell: A type of white blood cell and, specifically, a type of lymphocyte. Many B cells mature into what are called plasma cells that produce antibodies (proteins) necessary to fight off infections while other B cells mature into memory B cells. All of the plasma cells descended from a single B cell produce the same antibody which is directed against the antigen that stimulated it to mature.