Accepts electrons from cytochrome c, ultimately transferring them to oxygen, forming H2O. in the process, 2 protons are pumped across the membrane. Complex IV is a terminal oxidoreductase, meaning that it transferes the elctrons to the terminal electron acceptor, which, in this case, is O2.
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.
Lymphocytes and the lymph nodes. Naive lymphocytes are mature but haven't found antigen. They Circulate between blood, lymph and secondary lymph nodes. Lymphatic vessels pick up pathogens from infected tissue sites and arrive at the closest lymph node. T and B cells are at specific regions of nodes. Shape and size of nodes change in response to activation of lymphocytes.