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Results 1 to 4 of 4
  1. #1

    Join Date
    Apr 2010
    Location
    Seattle Side of the Mountains
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    hopefully this one shows up. - KingFisher It's the closest thing I could find to a snowflake. - Taurus Happy Birthday Girl. Wishing you many more. Ya thats why the Champagne is in play. hehehe - Strider199 For piping up - ~firefly~ Merry Christmas! - ~firefly~ 
    Merry Christmas - Cliff Merry Christmas - gadget228 Thank you and Happy Holidays! - KingFisher Merry x-mas and a Happy New Year Trillianne - Strider199 Happy New Year!!! - Rue 

    Default Friday Fish Factoid #4


    0 Not allowed!
    Horseshoe Crabs Save Lives... maybe even yours!

    First of all I need to start you out with the fact that horseshoe crab blood is blue... like Aunt Beru's milk blue! And that is NOT the coolest bit of this factoid. This is due to the fact that their blood does not have hemoglobin (iron contained protein transport of oxygen) like the average vertebrate, but has hemocyanin (copper contained protein transport of oxygen).


    Horseshoe crab blood is used as the major component in the LAL (Limulus Amebocyte Lysate) test to determine if injectable medications (and other blood contact medical devices) are safe to use. Specifically, the test is to determine if there is any gram-negative bacteria endotoxins (which make up the shell of the bacteria) in the compound. Endotoxins when injected into the blood stream can cause rapid fever and shock, quickly leading up to death.

    Horseshoe crab blood does not have a white blood cell based immune system. Instead it has Amebocyte cells that when they encounter endotoxins release a clotting factor that makes a blood clot to isolate and contain the bacteria. This is what the LAL test is looking for... the clots.

    Prior to the LAL test, drugs were tested by injection into a healthy rabbit to determine if the animal had a reaction.

    For the LAL test... horseshoe crabs are caught, blood is collected and then released, to rebuild their blood supply again. There are varying reports on the exact figures, but the majority of crabs survive this bleeding process.

    So the next time you are being injected, or visiting an aquarium, be sure to thank a horseshoe crab for being a blood donor!
    Last edited by Trillianne; 03-07-2014 at 04:51 PM. Reason: prettying the format

  2. #2

    Default


    0 Not allowed!
    Cool! They are also the oldest unchanged form of life on this planet, I think.
    Life is tough, it's even tougher if your stupid.
    If your not angry, your not paying attention...
    150G Cube FWLR (Morays) 75G Fresh (Bichers/Gourami) 24G Cube (Reef/Goby/Seahorse's/Garden Eels)
    10G Fresh (Beta)
    2 x 29G Breeders (cycling) to be ready for January 15

  3. #3

    Join Date
    Apr 2010
    Location
    Seattle Side of the Mountains
    Posts
    2,503

    Awards Showcase

    hopefully this one shows up. - KingFisher It's the closest thing I could find to a snowflake. - Taurus Happy Birthday Girl. Wishing you many more. Ya thats why the Champagne is in play. hehehe - Strider199 For piping up - ~firefly~ Merry Christmas! - ~firefly~ 
    Merry Christmas - Cliff Merry Christmas - gadget228 Thank you and Happy Holidays! - KingFisher Merry x-mas and a Happy New Year Trillianne - Strider199 Happy New Year!!! - Rue 

    Default


    0 Not allowed!
    I think some sponges and jellyfish have them beat for oldest animal. I'd not be surprised if there were plants older. Certainly there are several billions of years of known horseshoe crab existence which does rank them right up there.

  4. #4

    Default


    0 Not allowed!
    Woohoo for being crabby!
    55 g Goldfish Tank - 5 Fancies, 2 Dojos
    25 g Tropical Tank - Celestial Pearl Danio/Mixed

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