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Answer: Host

A parasite or virus lives on a host organism. A host organism lives in either mutualistic (when both host and parasite get the benefit) or comenslistic (when only the parasite gets the benefit) association with the parasite.

The host organism provides food, habitat and the entire cellular machinery which a parasite or virus use to proliferate new parasite or viral organsisms. The parasite or virus colonize in the host organism and produces symptoms of diseases.

Various parasites lives on their substrate to get their food. These parasites harm their substrate and get benefit from them. The substrate is called host.

What is parasitic nutrition?

Parasitic Nutrition is a mode of nutrition in which an parasite lives on the body surface or inside the body of another type of organism, referred as host.

The parasite obtains nutrition directly from the body of the host in which the parasite gets benefited and host gets harmed.

Parasites can be of two types,

  1. Endoparasite: the parasite that lives inside the body, example some worms, plasmodium, viruses, etc.
  2. Ectoparasite: the parasite that resides outside the body, example lice, flea, mosquito, etc.

Thus, an organism on which a parasite or virus lives is called a host.

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