Cestoda are one of the groups of flat worms and are known as the tapeworm. They are generally found in meat and can enter your body if the meat is not cooked properly. Tapeworms can grow from 15 to 30 feet but the longest one ever measured grew to be 60 feet. If a tapeworm is left untreated it can affect the brain of the host. The tapeworm has two thin of a body to have any respiratory organs and instead they have permeable skin. This skin can absorb oxygen and carbon dioxide and can get it directly to the blood stream easily.
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