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ATS-Science 7

Vertabrates Vocabulary

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
Created by: glink