Immune System protects the human body of pathogens
The immune system is a complex system of cells (leukocytes), Protein (antibodies) And organs that act collectively to protect the body from pathogens that cause diseases, detecting and destroying bacteria, viruses, fungi and cancer cells. The immune system is composed of leukocytes, antibodies, thymus, lymph nodes, bone marrow, spleen and skin. The leukocytes are further subdivided into: lymphocytes, granulocytes, monocytes, plasma cells and macrophages.
The immune system protects the human body of pathogens that cause infectious diseases with multiple lines of defense of increasing specificity. The simplest are physical barriers like the skin, which prevent pathogens such as bacteria and viruses enter the body. But if a pathogen penetrates these barriers, the innate immune system provides an immediate response, but not specific, in this system, the granulocytes types of white blood cells play a major role, attacking the foreign organism.
However, if pathogens evade the innate response, the human body has a third layer of protection, which is the adaptive immune system. Here the immune system adapts its response during infection, to improve the recognition of the pathogen. You can visit for details information about valve disinfection and prevent bloodstream infection.
In the adaptive immune system are B and T lymphocytes that play a role in the adaptation of defenses to new pathogens that invade the body, producing antibodies by plasma cells B lymphocytes altered. The information on this enhanced response remains even after the pathogen is eliminated, in the form of immune memory, allowing the adaptive immune system triggers attacks faster and stronger in the future if the immune system detects such pathogen.
In the adaptive immune system memory T cells are responsible for reading the DNA of bacteria and viruses then induce B lymphocytes to produce antibodies which then neutralize pathogens. Memory T cells are cells that are generated after activation of T cells by exposure to a foreign antigen (pathogen). They have long life, are functionally inactive, and can circulate for months or years, prepared to respond to new exposure to the same microbe.
