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| Term | Definition |
|---|---|
| Vertebrate |  animal that has a backbone |
| lateral line |  a faint line visible on both sides of a fhish's body that runs the length of the body and marks the location of sense organs that detect vibrations in water |
| swim bladder |  a gas-filled sac that is used to control buoyancy |
| endotherm |  an animal that can use body heat from chemical reactions in the body's cells to maintin a constant body temperature |
| gill |  an organ in fish that removes oxygen from the water and exchanges it with carbon dioxide from the blood |
| ectotherm | an organism that relies on sources of heat outside itself |
| amniotic egg | an egg that holds fluid that protects the embryo of a reptile, bird, or mammal |
| amphibian | an animal that lives on both water and land |
| metamorphosis | when an immature form of an animal changes to an adult form |
| lungs | saclike organs that allow amphibians to breathe |
| tadpoles | immature frogs or toads that must live in water |
| notochord | an embryonic structure in chordates that is usually replaced by the backbone |
| goldfish | member of the largest class of fishes (bony fishes) |
| crocodile | meat-eating reptile with narrow head and pointed snout spends most of its time in water |
| external fertilization | when a female fish lays unfertilized eggs in the water and the male drops sperm on them |
| common body parts of chordates | pharyngeal pouch, tail, notochord, hollow nerve chord |
| backbone | the one trait that sets vertebrates apart from simpler chordates |
| scales | help a fish protect its body and lower friction when the fish swims |
| three classes of fishes | cartilaginous, jawless, bony |
| how do adult amphibians breathe? | through their lungs and skin |
| stages of amphibian metamorphosis | fertilized egg, tadpole, adult frog |
| ecological indicators (frogs)? | because they are sensitive to changes in the environment |
| four groups of reptiles | Turtles and tortoises, crocodiles and alligators, snakes and lizards, tuataras |
| most common reptiles in the world today | snakes and lizards |
| Gills are to fish as | Lungs are to frogs |
| life jacket is to human as | swim bladder is to fish |
| endotherm is to warm-blooded as | ectotherm is to cold blooded |
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| Terms | 27 |
| Creator | ducky90210 |
| Created | September 28, 2009 |
| Groups | None |
| Subjects | None |
| Access | Anyone |
| Edit | Creator Only |
This is a set of notecards that will help you study for the Chapter 3 Test over Fishes, Reptiles, and Amphibians