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ATS-Science 7
Vertabrates Vocabulary
Term | Definition |
---|---|
Chordate | Animal that has a tail, notochord, hollow nerve cord, and pharyngeal pouch at some point in its development |
Vertebrate | An animal that has a backbone |
Notochord | A stiff but flexible rod that runs down the dorsal side of the body. Is usually replaced by a backbone |
Gill | An organ in fish that removes oxygen from the water |
Fish | Water dwelling vertebrates that are characterized by scales, fins, and throats with gill slits |
Internal fertilization | Fertilization of the egg inside the body of the female |
External fertilization | Fertilization of the egg outside the body of the female |
Cartilage | A tough material that makes up the ears and nose and is found in joints |
Lateral line | A faint line visible on both sides of a fish's body that allows the fish to detect vibrations in the water |
Swim bladder | A gas filled sac that is used to control buoyancy in bony fish |
Metamorphosis | A series of dramatic changes in the body form of an amphibian |
Tadpole | The aquatic, fish-shaped larva of a frog or toad |
Lung | A respiratory organ in which oxygen from the air is exchanged with carbon dioxide from the blood |
Ectotherm | An organism that needs sources of heat outside of itself |
Endotherm | Maintaining a constant body temperature |
Amphibian | An animal that can live both in water and on land |
Reptile | Animals with thick, dry skin to prevent evaporation of water |
Amniotic Egg | An egg, surrounded by a shell, which holds fluid to protect the embryo |