When microscopic invading agents such as bacteria, fungi or viruses organize a plan to infect and invade our bodies, our immune system is alerted and put into defense mode. Luckily, for us our body has a couple layers of protection to keep us from getting sick. The first layer is our skin, which delays all pathogens from freely entering, as the membranes in our skin cells are semi-permeable only letting in certain things. When you suffer a cut, our blood clots to stop pathogens from getting through. Your throat and nose ventilation systems are lined with mucus that catches pathogens not to mention the acid that is located in your stomach. However, from time to time the sneaky and slimy pathogens will find a way through the first layer of protection. That is when our second layer of protection kicks in, White blood cells. They ingest pathogens, produce antibodies or produce antitoxins to counteract the toxins made by bacterium. The White Blood Cells in our system serve as our army, as it protects our bodies from foreign invaders by demolishing any harmful toxin that it can find in our system. The second way our bodies can defend against dangerous pathogens correlates to prescribed antibiotics and medicines from a pharmacists or doctor. These are man-made medicines, usually created from fungi. This method will destroy all foreign pathogens but may also wipe out important bacteria's needed for our body's everyday functions. The third and most effective way our bodies can help prevent or fight off sickness/diseases is by becoming immune. In order to become immune, our body will need to be injected by a vaccine which is a dead or weakened part of the microscopic invading agents. This stimulates the body's immune system and prepares it for battle. But this weakened virus, fungi or bacteria is not strong enough to take over the body or make it ill; so that the next time our bodies come in contact with this sickness it is able to recognize and fight it off before becoming too sick to fight back.
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