Essay on The Innate Immune System Of The Gastrointestinal Tract

1500 Words Dec 17th, 2014 6 Pages
1. The innate immune system, also considered the first line of defense, is made up of different mechanisms that protect the host from infecting organisms. This system allows for immediate response to infection, and is found in all classes of plant and animal life. Though the innate immune system does provide immediate defense against an infecting agent, it does not provide long term protective immunity to the host, therefore it does not have memory.

The innate immune system utilizes protective barriers which act as the first line of defense against infection. Those protective barriers include the skin, gastrointestinal tract, respiratory airways and lungs, nasopharynx, and the eyes. The skin does not provide a suitable environment for bacterial growth due to the presence of oil glands in the dermis layer, lack of blood vessels, and the inability to retain moisture (Mayer, online). The action of peristalsis in the respiratory and gastrointestinal tract aid in moving infectious agents through and out of the body. The normal gut flora of the gastrointestinal tract also competes with invaders and aids in eliminating infectious organisms. The saliva and mucus in the nasopharynx region, along with the tears of the eyes behave like flushing mechanisms to protect the nose, eyes, and mouth from infectious organisms.

If the protective barriers of the innate immune response are breached, then the adaptive immune system is activated. The adaptive immune system is more specialized in…

Related Documents