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14 Cards in this Set

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a rodlike cord of cells that forms the chief axial supporting structure of the body
Notochord
An organism that generates heat to maintain its body temperature, typically above the temperature of its surroundings; a homeotherm.
endotherm
An organism that regulates its body temperature largely by exchanging heat with its surroundings; a poikilotherm.
ectotherm
gas-filled sac located against the roof of the body cavity of most bony fishes, originally functioning only as a lung, now serving in many higher fishes to regulate hydrostatic pressure.
swim bladder
What does the back bone protect
Body
Job of fish gills
oxe h2o goes in extrackts the oxegen and lets out the co2
how do fish reproduce
extermaly
3 groups of fish
boneless
cartoulageniouse
jawless
hw do adult anphib obtain oxegen
By it's lungs
Hw many chabers of a adult anphibian heart
3
why is anphib heart strong
to live on land
2 reasons anphib are sencitive are change in enviro ment
because thin skin
and no habitat
2 organs keep water in reptiles body
skin and kidneys
Differ in reptile and anphibs eggs
Reptile: have hard sheel withn membrain
anphib: tHEY DON'T