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vertebrates
flash cards
Term | Definition |
---|---|
CHORDATE | The phylum whose members have a notochord,a nerve chord,and slits in their throat area at some point in their lives. |
NOTOCHORD | A flexible rod that supports a chordates back. |
CARTILAGE | A flexible,strong tissue that is softer than bone. |
VERTEBRAE | The bones that make up the backbone of an animal. |
ENDOTHERM | An animal whose body controls and regulates its temperatures by controlling the internal heat it produces. |
FISH | An ectothermic vertebrate that lives in the water and has fins. |
swim bladder | An internal gas filled organ that helps a bony fish stabilize its body at different water depths. |
buoyant force | the force that water exerts upward on any underwater object. |
amphibian | an ectothermic vertebrate that spends its early life in water and its adult hood on land,returning to water to reproduce. |
atria | the two upper chambers of the heart that receives blood. |
ventricle | the lower chamber of the heart,which pumps blood to the lungs and body. |
reptile | an exothermic vertebrate that has lungs and scaly skin. |
habitat | the specific environment in which an animal lives. |
urine | the watery fluid in which the wastes produced by an animals cells are excreted. |
sedimentary rock | rock formed from hardened layers of sediments particles of clay,sand,mud,or slit. |
fossil | the hardened remains or other evidence of a living thing that existed a long time in the past. |
paleontologists | a scientist who studies extinct organisms,examines fossil structure,and makes comparisons to present-day organisms. |