Fish, Amphibians, and Reptiles
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22 terms
Terms | Definitions |
|---|---|
 chordate | The phylum whose members have a notochord, a nerve cord, 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. |
| ectotherm | An animal whose body does not produce much internal heat. |
| endotherm | An animal whose body regulates its own temperature by controlling the internal heat it produces. |
| fish | An ectothermic vertebrate that lives in the water and has fins. |
| cartilage | A tissue that is more flexible than bone. |
| swim bladder | An internal gas-filled organ that helps a bony fish stabilize its body at different water depths. |
| amphibian | An ectothermic vertebrate that spends its early life in water and its adult life on land. |
| tadpole | The larval form of a frog or toad. |
| lung | An organ found in air-breathing vertebrates that exchanges oxygen and carbon dioxide with the blood. |
| atrium | An upper chamber of the heart that receives blood. |
| ventricle | A lower chamber of the heart that pumps blood out to the lungs and body. |
| habitat | The specific environment in which an animal lives. |
| reptile | An ectothermic vertebrate that lays eggs and has lungs and scaly skin. |
| kidney | An organ that filters wastes from the blood. |
| urine | A watery fluid produced by the kidneys that contains wastes. |
| amniotic egg | An egg with a shell and internal membranes that keep the embryo moist; a major adaptation to life on land, characteristic of reptiles, birds, and egg-laying mammals. |
| fossil | The hardened remains or other evidence of a living thing that existed a long time ago. |
| sedimentary rock | Rock formed of hardened layers of sediments. |
| paleontologist | A scientist who studies extinct organisms, examines fossil structure, and makes comparisons to present-day organisms. |
| "He took the 5 loaves and 2 fish, and looking up to heaven, he gave thanks and broke them." | Luke 9:16 |
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