Term | Definition |
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. |