Immune system

The immune system is a network of biological processes to protect an organism from diseases. It detects and responds to a wide variety of pathogens,e.g. from viruses, parasitic worms, as well as cancer cells and objects such as wood splinters, distinguishing them from the organism’s own healthy tissue.
The human body has like many species two major subsystems of the immune system. The innate immune system which provides preconfigured response to broad groups of situations and stimuli. And the adaptive immune system which provides a tailored response to each stimulus by learning to recognize molecules it has previously encountered. Both subsystems mutually work together to fight foreign invaders.

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