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.
Knowledge center. A parasite is an organism that lives in another organism, called the host, and often harms it. It is dependent on its host for survival-it has to be in the host to live, grow and multiply.A parasite cannot live independently. Although a parasite rarely kills the host, in some cases it can happen.ypes of parasites There are several types of parasites. Below are examples of some. Ectoparasite-a parasite that lives on the host's surface, examples include some mites and hair and body lice. Endoparasite-one that lives inside the host, examples include heartworm, tapeworm, and flatworms.