The convoluted nasal passages of Ankylosauriern allowed for, presumably, an efficient heat exchange between the body and the air, and thus caused a cooling of the brain. The scientists at the Ohio University in Athens (Ohio, USA) from the corresponding computer simulations.
Jason Bourke and colleagues reconstructed the nasal cavities of Panoplosaurus mirus and it tutus and simulated the Flow of air and heat exchange. Their study is published in the journal “PLOS ONE”.
“The vast body that we see in the case of most of the dinosaurs, you need to be in the warm Mesozoic very hot”, and Bourke cited in a communication from the Ohio University. Just heavily-armored animals such as the Ankylosaurier were able to keep according to present knowledge, although a good heat in the body – cooling in case of Overheating, however, was probably difficult. About ten years ago, discovered a Co-author Lawrence Witmer, Ankylosaurier have a highly convoluted nasal passages. In the current study, the researchers examined the extent to which these coils in a heat exchange helpful.
initially created on the basis of existing fossils, a three-dimensional computer model of the nasal interior of Panoplosaurus and it. Then, they simulated the air currents during inhalation and Exhalation and the heat transfer between the nasal walls and air. While the nose has to warm up the Inhalation air to the vicinity of the body temperature, is to win on the Exhale as much as possible heat from the air. In mammals, provide built-in cavity in the nose, the turbinates, for an enlargement of the surface on which the heat exchange takes place.
The group to Bourke found out through simulations, that the spiral respiratory passage to exchange heat as efficiently as the turbinates of mammals. Then, they simulated a nose without the wind. “If we were in a short, easy-to-nose in the muzzle, decreased the heat transfer rates at the two dinosaurs by over 50 percent,” explains Bourke. He and his colleagues reconstructed vessels using grooves and channels in the bone, the blood. These layers so that the warm blood could make the body Body heat to the inhaled air. The evaporation of moisture in the long nasal passages cooled the blood that flowed to the brain.
the results of the researchers, according to the heat recovery led on the Exhale to energy savings of 65 percent in Panoplosaurus and of 84 percent in it. The latter probably needed a more efficient heat exchange, because he was bigger than Panoplosaurus.
“If we can caves us the nose and the breath to look at ways of dinosaurs, we see that the most pronounced noses are found in the great species of Dinosaurs,” said Witmer, according to the University communication. This indicates that the physiological loads of great body have caused the size may be some anatomical innovations, to regulate around the temperature in the brain.