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.
Roundworms are parasitic invertebrates that can inhabit the human body, primarily living in the intestines. The six most common types of roundworms include pinworms, ascaris, hookworms, whipworms, strongyloides and trichinella spiralis.Roundworms vary in size, transmission and habitat.Though most roundworm infections are not life threatening in healthy people, many cause uncomfortable and sometimes serious symptoms.he six most common types of roundworms include pinworms, ascaris, hookworms, whipworms, strongyloides and trichinella spiralis. Roundworms vary in size, transmission and habitat.