Overview Of The Immune System

Every day special cells, tissues, proteins and organs which made overall immune system defend against microorganisms, germs and viruses which enter our body. Immune system is system which is able to prevent organism and kill the pathogens. Most of time immune system has dual system in properties and has capacity to identify self and non-self organisms (1). For instance, immune system can be general or specific, natural or adaptive (sometimes called innate or acquired), cell mediated or humoral, active or passive and also primary and secondary (2). Immune system is able to recognize and attack particular antigens, it is called ‘antigen specific’ part, also it has ‘systemic’ part which works throughout the body, and it is not restricted only to initial infection site. Moreover immune system has ‘memory’ part which is able to recognize and attack stronger to the same antigen next time. This essay will discuss each dual part of immune system: organs, cells and soluble components, also describe the difference between innate and acquired immune system.

Human organism has two fluids which intertwined throughout the body: blood and lymph. They are responsible for transporting the agents of immune system. Lymphoid system is composed of tissues and organs which produce specific resistance to human diseases (3). Also it consists of tissues which found in lymph nodes. Lymphoid tissues dedicated to circulation and production of lymphocytes, while lymph nodes serve as filtration of lymphoid system and activation of lymphocytes. Human lymphoid system has two organs: central or primary lymphoid organ and peripheral or secondary lymphoid organ. Primary organs are located in bone marrow and thymus and generate lymphocytes from immature progenitor...

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...m up, human immune system is complex system which every cells, tissues and organs of immune system are closely related to each other and work intimately. Currently as a secondary response of body scientists discovered the vaccine which contains antigen from pathogens and produce memory cells, therefore it gives protection to organism from infections. However immunity is fascinating subject and there are still many secretes of it. When immune system fully understood, there might be solved many disease related problems in the world.

Works Cited

1. Alibek, K. (2011). Lecture: Immunology and Vaccinology. PowerPoint slides.

2. http://uhaweb.hartford.edu/BUGL/immune.htm#intro

3. http://faculty.ucc.edu/biology-potter/lymphoid_system.htm

4. http://pathmicro.med.sc.edu/ghaffar/innate.htm

5. http://www.nobelprize.org/educational/medicine/immunity/immune-detail.html