Innate Immunity. Humans are exposed to millions of potential pathogens daily, through contact, ingestion, and inhalation. Our ability to avoid infection depends in part on the adaptive immune system (discussed in Chapter 24), which remembers previous encounters with specific pathogens and destroys them when they attack again.The innate immune system includes: Physical Barriers such as skin, the gastrointestinal tract, the respiratory tract, the nasopharynx, cilia, eyelashes and other body hair. Defense Mechanisms such as secretions, mucous, bile, gastric acid, saliva, tears, and sweat. innate immunological system
The immune system can be divided into two overlapping mechanisms to destroy pathogens: the innate immune response, which is relatively rapid but nonspecific and thus not always effective, and the adaptive immune response, which is slower in its development during an initial infection with a pathogen, but is highly specific and effective at attacking a wide variety of pathogens ().
In the immune system, it is a major mechanism that the body uses to remove pathogenic material. In this article, we shall briefly review the process of phagocytosis, highlight major phagocytes in the immune system and discuss the clinical relevance of phagocytosis. Nov 25, 2016 Features and Components. Furthermore, the innate immune system can recognize antigens as a whole, which means that the antigens do not have to be degraded and presented first. The nonspecific defense is especially fast and takes place within seconds and minutes after the first contact with an antigen. On the one hand, innate immunological systemRating: 4.72 / Views: 357