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Viruses

Chapter 12

TermDefinition
virus A tiny, nonliving particle that enters and then reproduces inside a living thing.
host An organism that a parasite lives with, in, or on.
vaccine A substance used in a vaccination that consists of pathogens that have been weakened or killed but can still trigger the body to produce chemicals that destroy the pathogens.
flagellum A long, whiplike structure that helps a cell to move.
cilia Tiny, hairlike projections on the outside of cells that move in a wavelike manner.
cytoplasm The thick fluid region of a cell located inside the cell membrane or between the cell membrane and nucleus.
contractile vacuole The cell structure that collects extra water from the cytoplasm and then expels it from the cell.
alge Plantlike protists.
parasite An organism that benefits by living with, on, or in a host in a parasitism interaction.
protist An eukaryotic organism that cannot be classified as an animal, plant, or fungus.
protazoan A unicellar, animal-like protist.
pseudopod A "false foot" or temporary bulge of cytoplasm used for feeding and movement in some protozoans.
pigment A colored chemical compound that absorbs light.
spore In bacteria, protists, and fungi, a thick-walled, tiny cell capable of surviving unfavorable conditions and then growing into a new organism.
Created by: kgadegbeku
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