The element is a clause if there is a subject and a verb, and it is a phrase if both of these parts of speech are not present. What comes after the introductory element is always an independent clause, or complete sentence, on its own, and the introductory element gives meaning to it.
A parasite is an organism that lives on or in a host organism and gets its food from or at the expense of its host. There are three main classes of parasites that can cause disease in humans: protozoa, helminths, and ectoparasites.
Infestation. Nematodes. Parasites. Trematodes. Diseases and conditions caused by worms are as varied as the types of worms that cause them. Worms that act as parasites * come in thousands of different species, including roundworms, tapeworms, flatworms, flukes, and leeches.The worms may be microscopic, or they may be as long as 9 meters (almost 30 feet).nfestation. Nematodes. Parasites. Trematodes. Diseases and conditions caused by worms are as varied as the types of worms that cause them. Worms that act as parasites * come in thousands of different species, including roundworms, tapeworms, flatworms, flukes, and leeches.