[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]

Re: Unidirectional [...] Science



--- On Thu, 1/14/10, gsp1954@aol.com <gsp1954@aol.com> wrote:

> Water pressure more a couple of meters would have prevented
> inhalation 
> regardless of respiratory design. 

Yet another unconsidered factor -- sauropods may have been able to create 
pressure oscillations in the airsacs simply by walking, as can penguins.

J Exp Biol. 2001 Oct;204(Pt 20):3581-6.
The influence of locomotion on air-sac pressures in little penguins.
Boggs DF, Baudinette RV, Frappell PB, Butler PJ.

"... There was no abdominal muscle activity associated with swimming or 
exhalation, but the abdominal muscles were active with the step cycle in 
walking penguins, and oscillations in posterior air-sac pressure (0.08+/-0.038 
kPa) occurred with steps."