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Chapter 3

TermDefinition
chordate The phylum whose members have a notochord, nerve cord, and slits in the throat area at some point in their life.
Vertabra Bones that make up the backbone.
Notochord Flexible rod that supports a chordates back.
Ectotherm An animal whoes body controls and regulates its tempature by controlling its internal heat it produces.
Cartilage. Flexible strong tissue softer than bone.
endotherm Animal whoes temp is controled by the internal heat produced.
Fish an ectothermic vertabrate that lives in the water and has fins.
Swim Bladder An internal gas- filled organ that helps a bony fish stabalize its body at different water depths.
Bouyant Force The force the water exerts upward on any under water object.
Amphibian An ectothermic vertabrate that spends its early life in the water and adulthood on land only in water to reproduce.
Fossil The hardened remains or other evidence of a living thing that existed a long time ago.
Sedmintary Rock Rock formed from hardened layers of sediments particles of clay sand mud or silt.
Urine Watery fluids in which wastes produced by an animals cell are exerted.
Habitat Specific enviroment in which an animal lives.
Atrium An upper chamber in the heart.
Ventricle Lower chamber of the heart, which pumps blood out to the lungs and body.
Reptile An ectothermic vertebrate that has lungs and scaly skin.
Paleontologist Scientist who studies extinct organisms, examines fossil structures and makes comparisons to present day organisms.
Created by: lexiimanny
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