Symbiosis is a close relationship between two organisms in which one organism lives near, on, or even inside another organism and in which at least one organism benefits. There are three different types of symbiosis, mutualism, commensalism, and parasitism. Mutualism is a form of symbiosis in which both organisms benefit. Commensalism is a form of symbiosis in which one organism benefits and the other is not harmed. Lastly, parasitism is a form of symbiosis in which an organism benefits and the other is harmed. In parasitism there is a parasite and a host. A parasite is an organism that lives on or inside the body of a host organism and harms the host. A host is an organism that provides a home for another organism; in parasitism, the host organism that is harmed by the parasite. For example, a tapeworm is a parasite causing infections in humans. A tapeworm infection is caused by eating meat that is not cooked enough. The tapeworm once inside the human can grow to be very large. According to a recent Mayo Clinic article, a tapeworm can measure 50 feet long and stay in the body for 20 years. Tapeworms can attach themselves to the intestine and grow there for many years. Tapeworms can cause symptoms of pain in the stomach, dizziness and diarrhoea. A tapeworm can be removed using surgery or using strong medicine. In the picture above, on a show called "House," the doctors are taking out a tapeworm from a woman's body. In my opinion, tapeworms are very disgusting. Therefore, I would cook everything well before I eat just in case there is a tapeworm in it. I would not want to be in the hospital for eating something bad.
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