A unit of weight equal to 2,000 pounds (0.907 metric ton or 907.18 kilograms). Also called net ton, short ton. 2. A unit of weight equal to 2,240 pounds (1.016 metric tons or 1,016.05 kilograms). Also called long ton.
Cellular immunity is a protective immune process that involves the activation of phagocytes, antigen-sensitized cytotoxic T cells and the release of cytokines and chemokines in response to antigen. Cellular immunity is most effective against cells infected with viruses, intracellular bacteria, fungi and protozoans, and cancerous cells.
Definition. Innate immunity is an immunological subsystem that comprises the cells and mechanisms that provide the first line of defence from infection in a non-specific manner. Innate immune responses are rapid and independent of antigen.Innate immune systems are found in all classes of plants and animals.nnate immunity is an immunological subsystem that comprises the cells and mechanisms that provide the first line of defence from infection in a non-specific manner.