For all living organisms, there is a challenge for surviving by defeating the entire pathogenic organism. The human body kills the pathogen or eliminates the foreign particles by an organized system called the lymphatic system. The lymphatic system or immune system consists of a group of cells or immune cells, which inhabits all the organs of the body. The lymphatic system includes lymphatic organs and a group of lymphatic tissues that are involved in the immune system. There are two types of immunity; they are innate immunity and adaptive immunity. Adaptive immunity further categorized as cellular and humoral mediated immunity.

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Chapter 21.4, Problem 21BYGO

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For all living organisms, there is a challenge for surviving by defeating the entire pathogenic organism. The human body kills the pathogen or eliminates the foreign particles by an organized system called the lymphatic system. The lymphatic system or immune system consists of a group of cells or immune cells, which inhabits all the organs of the body. The lymphatic system includes lymphatic organs and a group of lymphatic tissues that are involved in the immune system. There are two types of immunity; they are innate immunity and adaptive immunity. Adaptive immunity further categorized as cellular and humoral mediated immunity.

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