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18 terms

Chapter 12 - Fish, Amphibians, Reptiles

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vertebrate
an animal with a backbone
ectotherm
an animal that cannot regulate its own body temperature, it must depend on the temperature outside its body
endotherm
an animal that generates its own body heat and controls its body temperature from within
cartilage
strong connective tissue that supports the body and is softer and more flexible than bone
fossil
the preserved remains or traces of an organism that lived in the past
sedimentary rock
a type of rock that forms when particles from other rocks or the remains of plants and animals are pressed and cemented together
fish
an ectothermic animal that lives in water, breathes oxygen through gills, and has fins for swimming
bony fish
fish that have bony skeletons, paired fins, scales, jaws, and some have teeth; goldfish and salmon are examples
jawless fish
fish that have round suction cup mouths, rasping tongues, some have teeth, no scales, and they suck body fluids from other animals
Cartilaginous fish
sharks, rays, and skates; fish that have carilaginous skeletons, jaws and teeth, all are carnivores
swim bladder
a small sac in a bony fish that can be inflated with air to help a fish swim at shallower depths, or deflated to help the fish sink to deeper water
buoyant force
the force that water pushed up on any object under water
amphibian
an ectothermic vertebrate that starts life in the water, lives in water during a larval stage, then undergoes a metapmorphosis to be able ot live its adulthood on land
atrium
an upper chamber of an amphibian or reptile heart
ventricle
the lower chamber in an amphibian or reptile heart
habitat
the place where an organism lives and can get all the things they need to survive
reptile
an ectothermic vertebrate that lays eggs and has lungs and scaly skin
urine
fluid wastes removed from the body, made by the kidneys