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The Lymphatic System – Secondary circulatory system of vessels and nodes that carry “lymph”. It balances the fluids that help fight pathogens and diseases. Lymph Nodes – small lumps located throughout the body that kill germs that invade the body’s tissues. Lymphocytes – white blood cells that carry T-cells and B-cells. They react to antigens (attach the germ to the body cells to harm them). When the antigens release toxins, poisons or bacteria into the body activating the T-cells and Bcells. T-cells – attack germs and tell B-cells to work B-cells – fight germs by releasing antibodies (proteins that attach to germs and stop them from reproducing) HW* define the “Words to Know” on pages 345 & 350