life science, ch. 11
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20 terms
Terms | Definitions |
|---|---|
 chordate | all members of the phylum are called this . at some point in their lives they will have a notochord and slits in the throat area |
| notochord | a flexible rod that supports a chordate's back |
| vertebrae | like beads on a string these make up your spine |
| ectotherm | an animal whose body does not produce much internal heat FISHES AMPHIBIANS REPTILES |
| endotherm | an animal whose body regulates its own temperature by controlling the internal heat it produces |
| fish | a vertebrae that lives in water and uses fins to move - has fins, ectotherms usually, gills, and scales |
| cartilage | tissue that is more flexible than bone |
| swim bladder | an internal , gas-filled sac that helps the fish stay stable at different depths in the water (bonyfish) |
| amphibian | a vertebrate that is ectothermic and spends its early life in water "double life" |
| tadpole | the larva of a frog or a toad |
| lung | the organs of air-breathing vertebrates in which oxygen gas and carbon dioxide gas are exchanged between the air and the blood |
| atrium | the 2 upper chambers of the heart |
| ventricle | pumps blood out to the lungs and body - lower chamber |
| habitat | the specific environment in which it lives |
| fossil | the hardened remains or other evidence of a living thing that existed a long time ago |
| sedimentary rock | hardened layers of sediments |
| paleontologist | the scientists who study extinct organisms , examine fossil structures & make comparisons to present day organisms |
| reptile | ectothermic vertebrae that has lungs and scaly skin |
| kidneys | organs that filter wastes from the blood |
| amniotic egg | an egg with a shell and internal membranes that keep the embryo moist |
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