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chapter 3.1vertebra
| Term | Definition |
|---|---|
| Endotherm | An animal whose body controls and regulates it's tempurature by controlling the internal heat it produces |
| Ectotherm | An animal whose body does not produce much internal heat |
| 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 chordate's back |
| Vertebra | The bones that make up the backbone of an animal |
| Cartilage | A flexible, strong tissue that is softer than bone |
| 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 it's body at different water depths. |
| Bouyant Force | The force that water exerts upward on any underwater object |
| Amphibian | An ectothermic vertebrate that spends its early life in water and its adulthood on land, returning to water to reproduce |
| Habitat | The specific enviroment in which an animal lives |
| Atrium | An upper chamber of the heart |
| Venticle | The lower chamber of the heart, which pumps blood out to the lungs and body |
| Reptile | An ectothermic vertebrate that has lungs and scaly skin |
| Urine | The watery fluid in which the wastes produced by an animals cells are excreted |
| Fossil | The hardened remains or other evidence of a living thing that existed a long time in the past |
| Sedimentary Rock | Rock formed from hardened layers of sediments- particles of clay, sand, mud, or slit |
| Paleontogists | A scientist who studies extinct organisms, examines fossil structures, and makes comparasions to present-day organisms |