Protozoa: unicellular organisms, e.g. Plasmodium (malaria)
Metazoa: multicellular organisms, e.g. helminths (worms) and arthropods (Ticks, lice, mites, fleas )
An endoparasite: “a parasite that lives within another living organism” – e.g. malaria, Giardia, helments
An ectoparasite: e.g. Ticks, lice, mites, fleas