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Term
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Definition
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Abdomen
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The rear body section of some invertebrates
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Antennae
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Flexible sensory appendages (occurring in pairs) on the heads of some invertebrates
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Appendage
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Any extension or outgrowth from the body
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Aquatic
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Living or growing in water
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Bacteria
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Single-celled microorganisms (largely responsible for decay and decomposition of organic matter)
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Bristles
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Stiff hairs
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Bulbous
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Rounded or swollen shape
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Calcium carbonate
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A white solid occurring naturally as the mineral calcite and in limestone (also present in the shells and bones of some animals)
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Carnivorous
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Meat eating
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Clarity
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Clearness or transparency
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Coil shaped
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A form with spirals or rings around a center point
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Data
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Facts or pieces of information
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Digestive track
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Connected organs within the body through which food material passes while being broken down and absorbed
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Distinct
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Clearly defined and easily recognized
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Dome shaped
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A form that resembles half of a sphere
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Filament
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A very fine or thread-like fiber
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Foraging
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Searching for food
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Fresh water
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Water that is not salty
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Fungi
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A group of organisms that lack chlorophyll and obtain nutrients from dead or living organic matter
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Gill tufts
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Fluffy clusters of gill filaments
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Gills
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Breathing apparatus for aquatic organisms (may appear as filaments, tufts, or plates)
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Invertebrates
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Organisms without a backbone
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Larva (Larvae plural)
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Juvenile form of many insects and other organisms that become different in form when changed into adults
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Lobes
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Rounded projections
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Locomotion
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Movement from place to place
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Macro- invertebrates
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Animals that have no backbone and are visible without magnification
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Monitoring
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The repeated observation of condition, especially to detect and give warning of change
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Nutrient
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A material that serves as food or provides nourishment
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Oblong
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Elongated (stretched) from a square or circular shape
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Operculum
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A lid or plate that covers the shell opening of some snails
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Organic
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Derived from living organisms
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Organic enrichment
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The addition of nutrients from organic matter
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Organically polluted
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Made unfit for living things by excess addition of organic matter
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Oval
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Shaped like an egg
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Oxygen
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A colorless gas in the atmosphere that is essential for animal respiration
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Parasites
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Organisms that live on or in the body of different organisms from which they obtain nutrients
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Platelike
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Resembling thin, flat sheets of uniform thickness
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Predator
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An organism that captures and feeds on other organisms
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Respiration
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Breathing, or the exchange of gases between the body and the environment
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Retractable
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Capable of being drawn or pulled back
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Riffle
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A shallow area of a stream in which water flows rapidly over a rocky or gravelly stream bed
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Scavengers
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Animals that feed on dead or decaying organic matter
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Secrete
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To generate and release a fluid or substance
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Segmented
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Divided into similar, repeated sections or units
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Species
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The basic category of biological classification consisting of similar organisms that are capable of mating and reproduction
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Spindly
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Slender and long in a way that suggests weakness
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Stream bed
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The stream bottom or surface over which a stream flows
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Tapered
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A shape that is gradually narrower or thinner toward one end
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Umbo
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The raised, knob-like section of some clam and mussel shells
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Wedge shaped
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A form that is thick at one edge and tapered to a thin edge at the other
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