Endothermic Diapsids

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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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