immune-system is our first line of defense
 The strength of our immune-system determines our ability to resist viral infections and lifestyle diseases like cancer.
If our immune system is compromised, it affects the speed and effectiveness to mount a system immune response, which canlead to increased possibilities of us being affected by infectious disease, both bacterial and viral.  A weak immune system also undermines it's ability to detect and eradicate cancerous cells. With a compromised system immune, poor integration of all of its components may lead to many immune related disorders such as allergies and chronic autoimmune diseases.
The ingenious system
The secret weapon of the this system is the ability to distinguish between the body's own cells ("self") and foreign cells ("non-self"). The key players at was are the white bood cells called lymphocytes. A variety of white blood cells are formed in bone marrow and the thymus, congregate in the lymph nodes and other organs, and travel throughout the body in lymph fluid or the bloodstream. The networking ability of this intriguing system dot the body and are connected by lymph and blood vessels to form a web of protection against infection.Like a soldier in the heat of battle, lymphocyte detection of "non-self" cells stimulates a burst of activity, swarming to the infection site, reproducing targeted assassins rapidly, producing stockpiles of killer chemicals, and more. Thereal fighters of lymphocytes include: - Natural killer cells - capable of attacking any foreign invader with lethal chemicals
- Killer T-cells - specialized cells that attack only specific matching targets
- B-cells - secrete antibodies into body's fluids, which ambush foreign cells (antigens) in the bloodstream
The human immune-system is a marvel of ingenuity... it's our first line of defense against invasions on our health. It helps determine the survival of the fittest. Your Health Immune System
The Immune System is a system of biological structures and processes within an organism that protects against disease by identifying and killing pathogens and tumour cells. It detects a wide variety of agents, from viruses to parasitic worms, and needs to distinguish them from the organism's own healthy cells and tissues in order to function properly. Detection is complicated as pathogens can evolve rapidly, producing adaptations that avoid the immune system and allow the pathogens to successfully infect their hosts
(Wikipedia)
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