Endothermic Diapsids
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Last updated 12:50 AM on 3/2/25
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5 Terms
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Similarities between dinosaurs and birds
similar teeth(or teeth structures as birds lack teeth but have genes for teeth)
bone structure
both have fetahers
Skeletal structure
some birds have dinosaur like fingers
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Bird Structures
Keeled Sternum- allows for muscle attatchment
Wishbone- fused clavicle bone
Hollow bones
Reduced and fused bones
lack teeth
4-chambered heart
All primarily to lose weight for flight
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Adaptations for flight
forelimbs modified as wings
keeled sternum
undirecional lung (9 paired air sacs)
feathers
no bladder/semisolid urine (uric acid)
toe-lock system
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Bird Breathing
3 chambers for breathing- 2 air sacs with lungs in between
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Note 
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