EVERYDAY SCIENCE

Detailed explanation-1: -In biology and medicine, a host is a larger organism that harbours a smaller organism; whether a parasitic, a mutualistic, or a commensalist guest (symbiont). The guest is typically provided with nourishment and shelter.

Detailed explanation-2: -The term host mainly refers to a living organism that acts as a harbour for invading pathogenic organisms. The host also includes the living cells, tissue and any specialised organs of a living organism. The host can be humans, plants and animals.

Detailed explanation-3: -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.

Detailed explanation-4: -Host. An organism that is infected with or is fed upon by a parasitic or pathogenic organism (for example, a virus, nematode, fungus). The term can also be applied, loosely, to a plant supporting an epiphyte.

Detailed explanation-5: -: one who receives or entertains guests socially or as a business. : a living animal or plant on or in which a parasite lives. host.