Re: [Phys-L] biophysics: warm-blooded fish!

[Bernard Cleyet <bernard@cleyet.org>]

On 2015, May 14, , at 15:22, John Denker <jsd@av8n.com> wrote:

> Mammals and birds have similar structures, applied to
> extremities (not lungs), allowing the extremities to
> get cold while the core temperature remains high.
> http://www.newscientist.com/blog/lastword/1997/02/why-dont-penguins-feet-freeze.html


Here’s a coupala schematics:  


https://www.google.com/search?q=countercurrent+heat+exchanger&client=safari&rls=en&tbm=isch&imgil=gOgm5mM_OZf9pM%253A%253Ba1acDbqNwneOoM%253Bhttp%25253A%25252F%25252Fbio1152.nicerweb.com%25252FLocked%25252Fmedia%25252Fch40%25252Fcountercurrent.html&source=iu&pf=m&fir=gOgm5mM_OZf9pM%253A%252Ca1acDbqNwneOoM%252C_&usg=__Agcam8mJab_kSH4IwwrfK5fb4Ow%3D&biw=1359&bih=784&ved=0CD8Qyjc&ei=LTdWVfKHHM2NyASy2QE#imgrc=gOgm5mM_OZf9pM%253A%3Ba1acDbqNwneOoM%3Bhttp%253A%252F%252Fbio1152.nicerweb.com%252FLocked%252Fmedia%252Fch40%252F40_15CountercurrentHea.jpg%3Bhttp%253A%252F%252Fbio1152.nicerweb.com%252FLocked%252Fmedia%252Fch40%252Fcountercurrent.html%3B664%3B524  


another example of evolutionary success:

 If we don’t count our time of evolution, we created streamlining in a few centuries.  Vide   da Vinci:  


Not Just Going with the Flow » American Scientist  


http://www.americanscientist.org/issues/feature/not-just-going-with-the-flow/1  


bc first saw the streamlining comparison of trout in “Shape and Flow”.  


Here are the “films” (now videos).

National Committee for Fluid Mechanics Films  


http://web.mit.edu/hml/ncfmf.html