what is a human symbiotic relationship
Parasitism. Parasitism is a symbiotic relationship in which one organism benefits (the parasite) and the other organism is harmed (the host). Often parasitism involves the parasite obtaining nutrition directly from the host organism.arasitism. Parasitism is a symbiotic relationship in which one organism benefits (the parasite) and the other organism is harmed (the host). Often parasitism involves the parasite obtaining nutrition directly from the host organism.