Internal Parasite Biology Definition. This means that the first step into their life cycle is the creation of a organism therefore it may be compared to an virus for example. Many of these types of cells require specialized host types and invasion of host cells occurs in different ways.
In some cases the parasite can harm the host and in other situations it is completely harmless. Parasite - an animal or plant that lives in or on a host another animal or plant. A parasite is any organism that lives and feeds off of another organism.
Obligate intracellular parasites on the other hand need a host cell to live and reproduce.
This means that the first step into their life cycle is the creation of a organism therefore it may be compared to an virus for example. Some examples of intestinal parasites include tapeworms roundworms pinworms. Definition of a Parasite Parasites are plants or animals that live on or in a host getting their nutrients from that host. The parasite derives all benefits from the association and the host may either not be harmed or may suffer the consequences of this association a parasite disease.