Warm Blooded Versus Cold Blooded Dinosaurs

1533 words - 6 pages

Warm Blooded Versus Cold Blooded Dinosaurs

 
            At a time, scientists believed all dinosaurs were cold-blooded.  However, with a recent discovery of a dinosaur found with a fossilized heart in the northern part of South Dakota in 1993, many paleontologists are starting to think that there were some dinosaurs that were warm blooded. 

            Dinosaurs were first believed to be cold-blooded because they were thought to be related closely to reptiles which are cold-blooded creatures.  Cold-blooded animals don’t actually have “cold” blood, instead they rely on the temperature from their environment to regulate their own body temperature.  They do this by taking advantage of external heat by basking in the sun, and by lying in the shade to cool down.  A more correct term is “ectothermic” which means “heat from outside.”  On the other hand, a warm-blooded animal creates heat internally by chemical reactions inside their body.  They are able to regulate their body temperature internally instead of relying on their environment.  Author of the article, “Dinosaurs: Warm or Cold Blooded?” Beverly Eschberger explains, “endothermic animals have a continually high requirement for food to fuel the heat generation.  Providing they can find food their constantly-optimum body temperature means that they can stay active even when it is very cold” (par 3).          Even though it was believed that dinosaurs were closely related to cold-blooded reptiles, most dinosaurs had similar behaviors of a bird which is a warm blooded animal.  Believing dinosaurs were warm blooded would help explain the reason why dinosaurs were so dominant and plentiful for such a long period of time.  There are many other factors that play a vital role in this particular controversy.  Evidence shows that dinosaurs were very active creatures, moving at very high speeds.  Because warm blooded animals don’t have to rely on their environment for body temperature, they are able to hunt at any time of the day or in any season, which is a great advantage over cold-blooded animals.  Therefore this “type of intense activity needs a fast metabolism which is much too high for a cold-blooded animal.  Secondly, cold-blooded animals have a hard time living in cold climates and dinosaur fossils have been found in the colder environments” (Eschberger).  However, scientists believe warm blooded animals would have suffered from the heat in warmer climates, where many fossils have been discovered.  Beverly Eschberger discusses how dinosaurs must have been only warm blooded animals due to the factors of, bone structure, and histology, growth rates, predator to prey ratios, speed and agility, rate of evolution, similarities with birds, and insulation.  She also explains the disadvantages of being a warm blooded animal: “a much larger expenditure of energy to maintain elevated metabolism and a commensurate increase in food requirements” (Eschberger).  Just as the conclusion that dinosaurs were...

Find Another Essay On Warm Blooded Versus Cold Blooded Dinosaurs

The Significance of Dinosaur Art Essay

1014 words - 4 pages Robert Bakker came up with a theory that dinosaurs were warm-blooded. He thought that fossils looked more like warm-blooded bones. Eventually his theory was accepted all over. This had a big impact on dinosaur art and then it encountered a drastic change. Instead of dinosaurs standing around and doing nothing but eating, they were now running and hunting their prey. The art changed from still life to a more action filled art, which appealed to more

Investigation of the Polar Dinosaur Essay

957 words - 4 pages the northern polar latitudes shows the dinosaurs that lived there to be similar to their southern relatives. However, a lack of evidence in certain species, especially crocodilians (cold blooded reptiles), would seem to suggest some non-avian dinosaurs were warm blooded and able to survive near freezing temperatures. In southeastern Australia, temperatures during the Mesozoic were thought to be even lower than in the North. Deposits

Dinosaurs

779 words - 3 pages saurischians were carnivorous. The majority were four-footed but some ornithischians and all carnivores walked on their hind legs. Always classified as reptiles, dinosaurs have traditionally been assumed to have been reptilian in their physiology, cold-blooded, and ectothermic. In recent years several different lines of evidence have been interpreted as indicating that dinosaurs may have had warm blood and high rates of metabolism, comparable to

Dinosaurs

715 words - 3 pages majority were four-footed but some ornithischians and all carnivores walked on their hind legs.Always classified as reptiles, dinosaurs have traditionally been assumed to have been reptilian in their physiology, cold-blooded, and ectothermic. In recent years several different lines of evidence have been interpreted as indicating that dinosaurs may have had warm blood and high rates of metabolism, comparable to birds and mammals. Evidence supporting this

Comparing Tyrannosaurus Rex and Raptor

1179 words - 5 pages quickness that would need to be had for this might provide evidence in the struggle to determine whether dinosaurs were cold-blooded or warm-blooded. This evidence clearly points to the later since a cold-blooded creature would be more sloth like and lazy.” (Jason Perrott) Through the evidence presented by all the paleontologist, I would rather have a run in with a tyrannosaurus Rex than a raptor. We don’t even know for a fact whether the T

Extinction

1174 words - 5 pages and the atmospheric amount of CO2 fell, the algae of the sea decreased which upset the ecological balance of the sea too: The algae were food for other sea-organisms, which were food for fishes and other see-animals, which also decreased, why the lope-finned fishes and the see-reptiles, ichthyosaurs, plesiosaurs, mesosaurs and others, consequently disappeared.These factors, and surely many others, brought the world of the dinosaurs to an end, leaving a world covered with foliated forests, and the possibility for the small, warm-blooded mammals to evolve.

What Really Happened to the Dinosaurs?

891 words - 4 pages metals, that were rare to Earth, found in the same layer as the dinosaur fossils but, the metal can be found in space from comets and asteroids. And then of course the asteroid or comet impact is really the only thing, out of all the other science theories, that mammals could have survived because “Mammals are able to maintain their body temperature. They are less dependent on environmental temperatures, unlike ‘cold-blooded’ species such as reptiles

The Relation Between Birds and Dinosaurs

993 words - 4 pages body. Bird experts claim that birds rest in this exact position in order to conserve heat. Therefore, the dinosaur found in this position is assumed to be warm-blooded, another similarity shared between birds and dinosaurs (Lemmonick 74 par. 1,7). Some skeptics might argue that there is no possible way that a dinosaur was found in the crouching position. They might also reason that when a dinosaur dies, it lies down and dies. I can agree with

Recreating Prehistoric Life: Jurassic Park

855 words - 3 pages . Furthermore, velociraptor would more likely have been covered in feathers rather than the lizard-like skin portrayed in the movie. One scene shows velociraptor fogging the window of a door. This is an endothermic or warm blooded trait as it implies the dromaeosaurid’s body temperature is above the temperature of his environment. There is also no evidence of dilophosaurus bearing a neck frill, and brachiosaurus did not have the ability to chew his

Extended Language Study

952 words - 4 pages a student's essay containing the informal SMS abbreviations: "The difference btwn cold-blooded animals and warm-blooded animals is that cold-blooded cr8tures take on the temp of their surroundings. Dey r hot when their environment is hot and cold when their environment is cold. While warm-blooded cr8tures try 2 kip d inside of their bodies at a constant temp. They do dis by gener8ting their own heat when they r in a cool environment and warm

What Really Killed the Dinosaurs?

885 words - 4 pages Dinosaur stress: Stress on the dinosaurs is a possible solution for their extinction. This theory was first thought up by Heinrch K. Erben when he found that the shell thickness of a certain type of dinosaur species decreased as time went on. It was thought that the warm climate and good habitats in the Cretaceous period could have caused over population of dinosaurs, thus an increase of stress on the dinosaurs would develop. Stress is known to

Similar Essays

Warm Blooded Or Cold Bloded Essay

668 words - 3 pages Dinosaurs, like other reptiles, were thought until fairly recently to be cold-blooded. There is still a good case for this viewpoint. But lately some scientists have swung to the idea that dinosaurs were warm-blooded. There is a good case for this too. Scientists have conflicting opinions on this subject. Some paleontologists think that all dinosaurs were "warm-blooded" in the same sense that modern birds and mammals are: that is, they had rapid

Were Dinosaurs Warm Blooded? Evidence Supporting The Claim That Dinosaurs Were Warmblooded From Strongest To Weakest...

1796 words - 7 pages food, protection, or migrate, so they must have high metabolic rate that would allow them to cruise from location to location, as most warm-blooded animals do. On the other hand, cold blooded tend to be more inactive and lie around. Ectothermic animals do not have the capacity to exercise and are rather lazy, which would imply that dinosaurs couldn't have been cold-blooded (Morell 1987: pg7).5.Dinosaur fossils/bones have been discovered in variable

“I’m The Most Cold Blooded Sonofabitch You’ll Ever Meet.” Ted

5082 words - 20 pages "I'm the most cold-blooded sonofabitch you'll ever meet." - Ted Bundy Men envied his grace and charm. Women admired his stunning good looks and polite manner. In the 42 years of his life, Ted Bundy acquired many names and faces. To his political friends he was a brilliant young man on his way up to the top in the legal system, maybe even a possible senator one day. To his mother, he was the ideal son, doing very well academically. His outside

Macbeth As A Cold Blooded Murderer Or A Man Possessed By Supernatural Events Beyond His Control

3699 words - 15 pages Macbeth as a Cold Blooded Murderer or a Man Possessed by Supernatural Events Beyond His Control Is Macbeth a cold blooded murdered or a man who cannot control his actions. Macbeth was a brave soldier who fought for his country but everything changed when he met the witches. Are the witches responsible for the murders carried out by Macbeth? I am also going to look at the evidence of the witches influence. Did the