HOME >> BIOLOGY >> NEWS
Dinosaurs: New study counters age-old theory

says. "This is impossible for at least three reasons. First, it would be difficult to fit such a heart in the available space; second, the heart would use more energy than the entire remainder of the body, and third; the thick walls would be mechanically so inefficient that they would expend more energy deforming themselves than in actually pumping the blood."

There only two viable solutions to the dinosaurs blood pressure problem, Dr Seymour says: either they were restricted to holding their necks horizontally, that they were cold-blooded animals with low blood flow rates.

"We admit that they could have had a vertical neck, with blood supplied from a smaller heart, but only if they had a low metabolic rate typical of a cold-blooded reptile. Even in this case, however, the heart wall still would have been relatively thick and inefficient for pumping.

"The question whether dinosaurs were warm or cold-blooded has been debated over the last 30 years, but the metabolic rates of sauropods will probably never be known with certainty. In either case, it appears unlikely that these animals lifted their heads high as commonly depicted."


'"/>

Contact: Dr. Roger Seymour
roger.seymour@adelaide.edu.au
61-88-303-5596
Adelaide University
23-Oct-2000


Page: 1 2

Related biology news :

1. Student science contest participation influences study, career choices, alumni say
2. New study shows hope for treating inhalant abuse
3. International study findings link acne-like rash to effectiveness of new targeted cancer treatment
4. Cigarette smoke causes breaks in DNA and defects to a cells chromosomes, Pitt study finds
5. New study indicates arsenic could be suitable as first-line treatment in type of leukaemia
6. Phase II trials of second-generation antisense cancer drug planned following successful early study
7. Preclinical safety study shows adipose-derived stem cells improve heart function after heart attack
8. Indiana University, EPA to study airborne PCBs
9. K-State, other universities to study how climate affects plant evolution
10. USC study links historical increases in life span to lower childhood exposure to infection
11. Washington University in St. Louis leads group studying aging process

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:4/6/2017)... LONDON , April 6, 2017 ... Control, RFID, ANPR, Document Readers, by End-Use (Transportation & ... Energy Facility, Oil, Gas & Fossil Generation Facility, Nuclear ... Healthcare, Educational, Other) Are you looking for ... Authentication sector? ...
(Date:4/5/2017)... -- KEY FINDINGS The global market for ... of 25.76% during the forecast period of 2017-2025. The ... the growth of the stem cell market. ... INSIGHTS The global stem cell market is segmented on ... stem cell market of the product is segmented into ...
(Date:3/30/2017)...  On April 6-7, 2017, Sequencing.com will host the ... hackathon at Microsoft,s headquarters in Redmond, Washington ... developing health and wellness apps that provide a unique, ... is the first hackathon for personal genomics and ... in the genomics, tech and health industries are sending ...
Breaking Biology News(10 mins):
(Date:5/23/2017)... ... May 23, 2017 , ... Bacterial biofilms, surface adherent communities ... cause diverse pathologies ranging from food poisoning and catheter infections to gum disease and ... the tens of billions of dollars per year, there is currently a paucity of ...
(Date:5/23/2017)... ... May 23, 2017 , ... ... re-engineer their control technology again and again. METTLER TOLEDO has released two new ... The videos illustrate how integration of the ACT350 into Siemens and Allen Bradley ...
(Date:5/22/2017)... ... 22, 2017 , ... Baltimore biotech firm, PathSensors, announced that ... in developing and issuing recommendations to grow Maryland's biohealth industry and position the ... , The recommendations are contained in a report from the ...
(Date:5/21/2017)... LOS ANGELES, CA (PRWEB) , ... May 19, ... ... at the annual meeting and educational conference of the American Association of Bioanalysts ... at the Galleria Hotel in Houston. The conference reinforces AAB’s commitment to excellence ...
Breaking Biology Technology:
Cached News: