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Communicable Disease Terms

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Term
Definition
Disease   any condition that interferes with proper functioning of the body or mind.  
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Communicable Disease   a disease that can spread to a person from another person, an animal or an object  
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Germs   organisms that are so small that they can be seen only through a microscope  
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Pathogens   germs that are responsible for causing diseases  
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Infections   is a condition that occurs when pathogens enter the body, multiply and damage body cells  
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Viruses   the smallest and simplest disease causing organisms  
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Bacteria   tiny one-celled organism that live nearly everywhere  
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Fungi   primitive life-form, such as mold or yeasts, that can not make their own food  
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Protozoa   a one-celled organisms that have a more complex struture than bacteria  
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Immune System   is a combination of body defenses made up of cells, tissues,organs that fight off pathogens  
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Nonspecific Response   the same way our bodies react to an infection  
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Inflammation   response to injury, or disease resulting in a condition of welling, pain, heat and redness.  
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Lymphatic System   is a secondary circulatory system that helps the body fight pathogens and maintain its fluid balance.  
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Lymphocytes   special white blood cells in the lymph (B cells, T cells and NK cells)  
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B cells   they are formed in the bone marrow  
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T cells   they develop in the thymus gland  
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NK cells   they attack cancerous cells and are known as "Killer Cells"  
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Antibodies   proteins that attach to antigens, keeping them from harming the body  
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Antigens   are substances that sends the immune system into action  
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Vaccine   is a preparation of dead or weakened pathogens that is injects into the body to cause the immune system to produce antibodies  
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