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
a flexible rod that supports a chordate's back
like beads on a string these make up your spine
an animal whose body does not produce much internal heat FISHES AMPHIBIANS REPTILES
an animal whose body regulates its own temperature by controlling the internal heat it produces
a vertebrae that lives in water and uses fins to move - has fins, ectotherms usually, gills, and scales
tissue that is more flexible than bone
an internal , gas-filled sac that helps the fish stay stable at different depths in the water (bonyfish)
a vertebrate that is ectothermic and spends its early life in water "double life"
the larva of a frog or a toad
the organs of air-breathing vertebrates in which oxygen gas and carbon dioxide gas are exchanged between the air and the blood
the 2 upper chambers of the heart
pumps blood out to the lungs and body - lower chamber
the specific environment in which it lives
the hardened remains or other evidence of a living thing that existed a long time ago
hardened layers of sediments
the scientists who study extinct organisms , examine fossil structures & make comparisons to present day organisms
ectothermic vertebrae that has lungs and scaly skin
organs that filter wastes from the blood
an egg with a shell and internal membranes that keep the embryo moist
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