Ambient Temperature C

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Body Temperature (C)
Ambient Temperature (C)
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POSTURE VS. METABOLISM
Upright
Sprawling
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Coelurosauria
Relative Brain Size
Carnosauria
Ornithopoda
Living Lizard
Ceratopsia
Stegosauria
Ankylosauria
Sauropoda
BRAIN SIZE RELATIVE TO LIVING LIZARD
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Slow Growth
Rapid Growth
Rapid Growth with Periods of Growth Cessation
Fibro-lamellar bone with 2 growth stages (top)
cancellous bone (bottom) primary osteons
Zonal bone with primary osteons between
lamellated zones - growth rings
Zonal bone formed form lamellated tissue
with resting lines defining zones
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Living Endotherm
Dinosaur
Bone Microstructure
Living Ectotherm
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Bones From Modern Reptiles
Fibro-lamellar structure with four weakly defined
zones Young American Alligator
Enlargement of A showing non-lamellated
character Young American Alligator
Vascular bone without growth rings 1/2 Grown
Galapagos Tortoise
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Bone with Zonal Growth Rings Femur of
Ornithopod Rhabdodon Thinning of rings towards
top implies progressive slowing of
growth. Similar to modern crocodiles
but growth rate (thickness) is faster than any
known crocodile
Zonal Bone - Pubis of Sauropod Typical of
Reptilian Zonal Bone
Bone with Zonal Growth Rings Rib of
Allosaur-sized Carnosaur
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Blood Pressure
Mm Mercury
Living Endotherms vs. Ectotherms
Amphibians
Reptiles
Birds
Mammals
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meters
Heart-Brain Vertical Distance
Mm Mercury
Sauropods
Theropods
Ornithopods
Ceratopsians
Dinosaur Blood Pressure
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4 - Chambered
Imperfect 4 -Chambered
2 Chambered
Aerated
Nonaerated
Lizard
Crocodile
Mammal
Endotherm vs. Ectotherm Hearts
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Crocodiles
Turtles
Snakes
Lizards
Dinosaurs
Key
Birds and Mammals
Latitudinal Range
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Lion
1 year supply lion chow
Crocodile
1 year supply crocodile chow
Warm-Blooded Dinosaurs?
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PredatorPrey Ratios
Plant eaters
Meat eaters
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The Water Recovery Mechanism of Respiratory
Turbinates
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Hypacrosaurus (Hadrosaur)
Ornithomimus (Theropod)
Relation of Nasal Passage Cross-sectional Area to
Body Mass
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A. Crocodile
B. Ostrich
C. Big-horn Sheep
D. Nanotyrannus
E. Ornithomimus
F. Hypacrosaurus Lambeosaur
Axial Tomography of Nasal Passages