Lecture 21

Slide1: 

Ambient Temperature (°C) Body Temperature (°C)

Slide2: 

Upright Sprawling POSTURE VS. METABOLISM

Slide3: 

BRAIN SIZE RELATIVE TO LIVING LIZARD Relative Brain Size Coelurosauria Carnosauria Ornithopoda Ceratopsia Stegosauria Ankylosauria Sauropoda Living Lizard

Slide4: 

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 Slow Growth Rapid Growth Rapid Growth with Periods of Growth Cessation

Slide5: 

Living Endotherm Living Ectotherm Dinosaur Bone Microstructure

Slide6: 

Fibro-lamellar structure with four weakly defined zones Young American Alligator Bones From Modern Reptiles Enlargement of A showing non-lamellated character Young American Alligator Vascular bone without “growth rings” 1/2 Grown Galapagos Tortoise

Slide7: 

Zonal Bone - Pubis of Sauropod Typical of Reptilian Zonal Bone Bone with Zonal “Growth Rings” Rib of Allosaur-sized Carnosaur 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

Slide8: 

Amphibians Reptiles Birds Mammals Mm Mercury Blood Pressure Living Endotherms vs. Ectotherms

Slide9: 

Mm Mercury Sauropods Theropods Ceratopsians Ornithopods Heart-Brain Vertical Distance meters Dinosaur Blood Pressure

Slide10: 

Lizard Crocodile Mammal Imperfect 4 -Chambered 2 Chambered 4 - Chambered Aerated Nonaerated Endotherm vs. Ectotherm Hearts

Slide11: 

Birds and Mammals Key Latitudinal Range Turtles Crocodiles Snakes Lizards Dinosaurs

Slide12: 

Crocodile Lion 1 year supply lion chow 1 year supply crocodile chow Warm-Blooded Dinosaurs?

Slide13: 

= Plant eaters = Meat eaters Predator:Prey Ratios

Slide14: 

The Water Recovery Mechanism of Respiratory Turbinates

Slide16: 

Relation of Nasal Passage Cross-sectional Area to Body Mass Hypacrosaurus (Hadrosaur) Ornithomimus (Theropod)

Slide17: 

Axial Tomography of Nasal Passages A. Crocodile C. Big-horn Sheep E. Ornithomimus B. Ostrich D. Nanotyrannus F. Hypacrosaurus Lambeosaur