The LAW of Urination (for mammals)

Discussion in 'Bad Dog Cafe' started by getbent, Jan 29, 2019.

  1. getbent

    getbent Telefied Silver Supporter

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    “The urinary system evolved to eject fluids from the body quickly and efficiently. Despite a long history of successful urology treatments in humans and animals, the physics of urination has received comparatively little attention. In this combined experimental and theoretical investigation, we elucidate the hydrodynamics of urination across five orders of magnitude in animal mass, from mice to elephants. Using high-speed fluid dynamics videos and flow-rate measurement at Zoo Atlanta, we discover the “Law of Urination”, which states animals empty their bladders over nearly constant duration of average 21 seconds (standard deviation 13 seconds), despite a difference in bladder volume from 100 mL to 100 L. This feat is made possible by the increasing urethra length of large animals which amplifies gravitational force and flow rate. We also demonstrate the challenges faced by the urinary system for rodents and other small mammals for which urine flow is limited to single drops. Our findings reveal the urethra evolved as a flow-enhancing device, enabling the urinary system to be scaled up without compromising its function. This study may help in the diagnosis of urinary problems in animals and in inspiring the design of scalable hydrodynamic systems based on those in nature.”

    Based on this, I now limit rants to 21 seconds.
     
  2. Jupiter

    Jupiter Telefied Silver Supporter

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    Typing speed or reading speed?
     
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  3. Deeve

    Deeve Friend of Leo's Silver Supporter

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    great - I got up three times from a sound sleep to read this again
    :oops:
     
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  4. JL_LI

    JL_LI Friend of Leo's

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    And in the wild animals rarely live long enough to become afflicted with benign prostatic hyperplasia which slows the evacuation time to 21 minutes. Rant on. :eek::confused::lol::lol::lol:
     
  5. 3fngrs

    3fngrs Friend of Leo's

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    I think rants are more related to bile production.
     
  6. don71

    don71 Tele-Afflicted

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    Believe it or not.
    I've read about this before (probably right here). Conclusions were made about this time frame of 21 seconds as to keeping mammals at maximum alertness to predators.
     
  7. 24 track

    24 track Doctor of Teleocity Silver Supporter

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    you forgot to mention that urine stablizes to ammonia, which has both disinfection capabiltiesas wel as sterilization capabilities , and some animals use it to trace a hormone trail for other animals to follow as in Mice

    during long sea voyages in the tall ships , sailors would wash their clothes in tha amonia to clean them plus the decks got swabbed with it as well ( yick)
     
  8. Shuster

    Shuster Poster Extraordinaire

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    But they don't have to lift the seat;)
     
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  9. BuckNekkid

    BuckNekkid Tele-Meister

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  10. Fiesta Red

    Fiesta Red Friend of Leo's

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    I could have lived forever without knowing this...

    But now that I know it, I have to tell everybody.
     
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  11. getbent

    getbent Telefied Silver Supporter

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    yes.
     
  12. getbent

    getbent Telefied Silver Supporter

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    My goal is that half of my urination is outside (or at least outside the bowl) aim is for the compliance crowd!
     
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  13. getbent

    getbent Telefied Silver Supporter

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    I choose to believe that this is the first time you have read this... but, it cause a re cognizing so you think you read it before without reading it before. Like this.
     
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  14. rjp68

    rjp68 TDPRI Member

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    Autoimmunity is the beast of all burdens! May sound random but it's related!;):):twisted:
     
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  15. TeleFunk Man

    TeleFunk Man Tele-Afflicted

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    Why, why did I click on this post?
     
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  16. Bones

    Bones Telefied Ad Free Member

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    17155838_10211410836124044_6973927162088517166_n.jpg
     
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  17. brogh

    brogh Assistant Admin Staff Member

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    ...........
     
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  18. Guitarteach

    Guitarteach Poster Extraordinaire

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    Why is it rant worthy?

    Urology is a whole field of medical science. Intraspecies comparative studies would perhaps help fathom genetic foundations of certain conditions I would suppose.

    Whole range of largely forgotten practical applications of a bucket of wee. Might be useful on a deep space mission.

    In fact I would be interesting to know if it’s quicker or slower to pee in zero G. UTIs seem to be an issue.

    https://www.wired.co.uk/article/you-wouldnt-want-to-get-a-uti-in-space
     
  19. drf64

    drf64 Poster Extraordinaire

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    Have you an opinion on night soil?
     
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  20. getbent

    getbent Telefied Silver Supporter

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    TIMING! It is well below zero where you are... go outside and make PEE FOG!
     
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