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.
The two main types of intestinal parasites are helminths and protozoa. Helminths are worms with many cells. Tapeworms, pinworms, and roundworms are among the most common helminths in the United States.In their adult form, helminths cannot multiply in the human body. Protozoa have only one cell, and can multiply inside the human body, which can allow serious infections to develop.Intestinal parasites are usually transmitted when someone comes in contact with infected feces (for example, through contaminated soil, food, or water).rotozoa have only one cell, and can multiply inside the human body, which can allow serious infections to develop. Intestinal parasites are usually transmitted when someone comes in contact with infected feces (for example, through contaminated soil, food, or water).