Infection and Immune System

The immune system of human beings is classified into two categories, innate immunity (natural)   and adaptive immunity (acquired). There are major differences between the two divisions, but they share some cell functions and components. All living organisms are subjected to get attacked from disease-causing agents or pathogens. This process of protection gets more sophisticated as organisms become more complex. Multicellular animals have devoted cells or tissues to deal with infection. Other rejoinders are slower but are more adapted to the infecting agent. Jointly, these protections are known as the immune system. The main portions of the immune system are: the natural barriers (skin, mucous membranes, etc.), nonspecific cells (phagocytes, natural killer cells, etc.), and nonspecific molecules (complement, interferon, etc.). In addition, response of immune system towards invasion of microorganism depends on many factors, such as nutrition, general health, age, and genetic makeup of any human host.

 

  • Innate Immune System
  • Adaptive Immune System

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