Since T-cells act more directly on body tissues they are said to initiate ________.
What are the 2 major functions of lymph nodes:
1) production of lymphocytes 2) Filters lymph that runs through the network of vessels
What are 2 functions of the spleen?
1) Removal of abnormal blood cells and other blood components by phagocytosis 2) the storage iron recycled for red blood cells 3) The iniation of immune responses by B-cells and T-cells in response to antigens in circulating blood
What is the function of tonsils?
1) trap bacteria and viruses which you breathe in 2) have antibodies and immune cells that help to kill germs and prevent lung and throat infection
What are the structural similarities found in lymph nodes, spleen and tonsils?
1) they have a capsule 2) they are rounded organs with an internal parenchyma of lymphoid cells