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Word Count: 437
You live in a world of germs and youre at war Your bodys constant warm environment rich in nutrients is an ideal home where tiny organisms can thrive Their aim is to get in Your bodys job is to keep them out Through advances in cancer research scientists now believe more than 100 million immune cells exist For every virus or bacterium there seems to be an immune cell specifically designed to hunt down and destroy it But what happens when you are born without this ability The immune system is a network of cells and organs that work together to defend the body against attacks by foreign invaders These are primarily germs-tiny infection-causing organisms such as bacteria and viruses as well as parasites and fungi Because the human body provides an ideal environment for many germs or microbes they try to break in It is the immune systems job to keep them out or failing at that to seek them out and destroy them Without the blood cells needed to perform this function your body is susceptible to any disease or infection Some of the problems associated with an improperly functioning immune system are arthritis asthma allergies psoriasis lupus cancer chronic fatigue syndrome and a tendency to always be fighting some infection Infections are the most common cause of human disease They range from the common cold to debilitating conditions like chronic hepatitis to life-threatening diseases such as AIDS Microbes attempting to get into the body must first move past the bodys external armor The skin and the membranes lining the bodys gateways not only pose a physical barrier they are also rich in scavenger cells and IgA antibodies In normal humans microbes that cross the nonspecific barriers must then confront specific weapons tailored just for them Specific weapons which include both antibodies and cells are equipped and with singular receptor structures that allow them to recognize and interact with their designated targets Without
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