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Ambient Temperature (°C) PowerPoint PPT Presentation


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Body Temperature (°C). Ambient Temperature (°C). POSTURE VS. METABOLISM. Upright. Sprawling. Coelurosauria. Relative Brain Size. Carnosauria. Ornithopoda. Living Lizard. Ceratopsia. Stegosauria. Ankylosauria. Sauropoda. BRAIN SIZE RELATIVE TO LIVING LIZARD. Rapid Growth.

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Ambient Temperature (°C)

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Body Temperature (°C)

Ambient Temperature (°C)


POSTURE VS. METABOLISM

Upright

Sprawling


Coelurosauria

Relative Brain Size

Carnosauria

Ornithopoda

Living Lizard

Ceratopsia

Stegosauria

Ankylosauria

Sauropoda

BRAIN SIZE RELATIVE TO LIVING LIZARD


Rapid Growth

Rapid Growth with

Periods of Growth

Cessation

Slow Growth

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


Living Endotherm

Dinosaur

Bone Microstructure

Living Ectotherm


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


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


Blood Pressure

Mm Mercury

Living Endotherms

vs. Ectotherms

Amphibians

Reptiles

Birds

Mammals


meters

Heart-Brain

Vertical Distance

Mm Mercury

Ornithopods

Theropods

Sauropods

Ceratopsians

Dinosaur Blood Pressure


4 - Chambered

2 Chambered

Imperfect 4 -Chambered

Aerated

Nonaerated

Lizard

Crocodile

Mammal

Endotherm vs. Ectotherm Hearts


Crocodiles

Turtles

Snakes

Lizards

Dinosaurs

Key

Birds and

Mammals

Latitudinal

Range


Lion

1 year supply

lion chow

Crocodile

1 year supply

crocodile chow

Warm-Blooded Dinosaurs?


Predator:Prey Ratios

= Plant eaters

= Meat eaters


The Water Recovery Mechanism of Respiratory Turbinates


Hypacrosaurus

(Hadrosaur)

Ornithomimus (Theropod)

Relation of Nasal Passage Cross-sectional Area to Body Mass


A. Crocodile

B. Ostrich

C. Big-horn Sheep

D. Nanotyrannus

E. Ornithomimus

F. Hypacrosaurus

Lambeosaur

Axial Tomography of Nasal Passages


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