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Published byCatherine Cunningham Modified over 7 years ago
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Examples: Lizards, Snakes, Crocodilians, Turtles and Tortoises.
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Environment They are ectotherms- rely on behavior to help control body temperature. Ex: lay in the sun to get warm, go under a rock or tree to cool down Many are endangered due to habitat destruction and hunting for food, pets, or use of their skin. Food Source Some herbivores, some carnivores variety of animals and plants
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Maintaining Homeostasis - Internal (Circulation, Respiration, Excretion) Can not exchange gas through the skin, inhale and then force the air out. Double-loop circulatory system- 1 st loop brings blood to and from the lungs, 2 nd brings blood to and from the rest of the body Urine leaves the body in the form of waste, is held in the bladder until it is expelled Maintaining Homeostasis - External (Response) Larger brain Many have complex eyes and can see color well Some snakes have a good sense of smell Have sensory organs in the roof of their mouths that can detect chemicals when the reptile flick their tongues
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Movement Larger, stronger limbs Legs rotated further under the body so they can carry more body weight Turtles have flippers Reproduction Internal fertilization Lay eggs that develop outside the females body Some reptiles abandon their eggs (turtles) others guard their eggs (alligators) ; others carry their eggs in their bodies and they have a live birth Have a protective shell around the egg Evolutionary Milestone Extotherms, 4 appendages, lay eggs on land
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Picture and Vocabulary Picture on page. 801 Figure 31-4 Vocabulary: ectotherm (800), amniotic egg(802)
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