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15 Cards in this Set
- Front
- Back
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class reptilia
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evolved from amphibians
-oldest fossil 300 million years ago -"age of reptiles" 250-65 million yrs ago(mesazoic era) |
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reptilian members
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-order chemonia
-order squamata -order rhynocephalia -order crocodilia |
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order chemonia
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turtles, tortoise
-turtles are aquatic |
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order squamata
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lizards, snakes
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order rhynocephalia
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tuatara, only found in new Zealand
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order crocodilia
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alligators, caimans, crocodiles
-more advances, 4 chambers(for large body and run faster) -all reptiles except crocoilia have 3 chambers |
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reptilian evolutionary trend
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more advances cardio system
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reptile adaptation
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amniotic egg
skin with scales efficient rep/excre sys more efficient heart hearing olfaction heat sensors ectothermic reproduction parental care |
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amniotic egg
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-makes it so water isnt necessary for reproduction
-reptiles have created a safe haven for the embryo |
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amniotic egg makeup
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amnion
yolk sac allantois chorion albumen |
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amnion
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-amnionic membrane enclosing an amniotic sac
-fluid that embryo floats in, acts as protection -can be used to check for genetic disorders, while still a fetus |
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yolk sac
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-nourish developing embryo
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allantois
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-membranous sac, used for collecting excretion
-gass exchange, through blood vessels |
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chorion
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membrane that covers everything mentioned else
-found in birds |
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albumen
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-fluid
-white of the egg -pure protein and water |
