Overview

The body is protected from harmful intruders like viruses, bacteria, fungus, and parasites by the immune system, which is a complex network of cells, tissues, and organs. It is necessary to have a healthy immune system in order to keep one's health in good standing, and having an immune system that is fully operational is essential for warding off infections, preventing sickness, and promoting overall well-being. Immunity can be broken down into its two primary subtypes: innate immunity and adaptive immunity. The initial line of protection that the body has against infection is called innate immunity, and it is there from the moment of birth. This form of immunity is characterized by the presence of both physical barriers, such as the skin and mucous membranes, and specialized cells that are able to identify and eliminate invading pathogens. The immune system is very intricate and is composed of a diverse assortment of cell types and signaling chemicals. White blood cells, such as T cells and B cells, as well as cytokines and chemokines, which are signaling molecules that help coordinate immune responses, are some of the important actors in the immune system. Other key players in the immune system include antigen-presenting cells and dendritic cells. It is absolutely necessary to have a healthy immune system in order to protect the body from a wide variety of infectious agents. Infections can cause a broad variety of symptoms, some of which include fever, coughing, and weariness; in extreme circumstances, infections can even result in the failure of organs or even death. The immune system is essential for fighting off these infections and preventing them from causing serious harm to the body.

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9781088240045

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