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Vaccination and the components of the immune system

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´╗┐Components of the immune system. -Describe how the body prevents microorganisms from entering the body In the human body, the primary line of defence is the skin. The skin stops most of the microbes from entering the interiors of the body. If however, the pathogen is able to gain access into the body, the lymphatic system comes into play. The pathogen is eliminated before it begins to cause any more trouble. -Describe how phagocytic cells destroy pathogens Phagocytosis is a form of Endocytosis. In phagocytosis, the cell engulfs the bacteria and keeps it in a bubble like structure called a phagosome. From there the cell injects lysosomes into the phagosome. ...read more.


Some enter along with our food, while others get in via the nose. And, as we all know, many things can break through our skin. In everyday life we often receive cuts or scrapes, and every time this happens we face the risk of a full-scale invasion from bacteria or viruses. -Vaccinations How do they work? Vaccines help a body's immune system prepare in advance to fight infectious illnesses and potentially deadly diseases caused by infectious agents or their by-products. Essentially, vaccines give the body a preview of a bacterium, virus, or toxin allowing it to learn how to defend itself against that potential invader in advance. ...read more.


When this happens, the B cell starts to divide to produce clones of itself. During this process, two new cell types are created, plasma cells and B memory cells. -Suggest why booster vaccinations are given. They're a de-activated or weakened version of the virus or bacteria like most vaccinations but at a lower dose. They just allow the body to build more anti-bodies to defend against the infection and prevent disease. They may also be used to help the body produce anti-bodies for mutations of the given virus or bacteria which could infect a person who has been vaccinated against their other form. Your body can develop anti-bodies and store them away so that once the virus is introduced to your body the antibodies will be able to "take down" the virus quickly and effectively. ...read more.

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