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  1. #1
    Join Date
    Aug 2003
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    3,521

    Human Glands evolved from GILLS

    http://news.bbc.co.uk/1/hi/health/4067039.stm


    "The human parathyroid glands, which regulate the level of calcium in the blood, probably evolved from the gills of fish, say researchers.
    The gills of ancestral marine creatures were used to regulate calcium levels.

    A team from King's College London believe that they were internalised, rather than lost, when four-limbed, land-living animals evolved.

    The research is published in Proceedings of the National Academy of Sciences.

    This research suggests that in fact, our gills are still sitting in our throats - disguised as our parathyroid glands.

    Professor Anthony Graham
    Calcium plays a key role in many physiological processes, such as muscle contraction, blood coagulation and signalling by nerve cells. "


    I cannot remember where and when I read it, but I'm certain that at some point the baby fetus resembles a fish early on... or is it a worm... or a tadpole????? I'm confused.

  2. #2
    Join Date
    Aug 2003
    Posts
    3,642
    Quote Originally Posted by blueclouds
    I cannot remember where and when I read it, but I'm certain that at some point the baby fetus resembles a fish early on... or is it a worm... or a tadpole????? I'm confused.
    It's known as "ontogeny recapitulates phylogeny". Although discredited in the sense that there are no truly distiguishable "fish", "reptile" and "mammal" stages of human embryonal development, the dvelopment of a fetus does reveal an evolutionary process, namely vertebrate first >>>> cerebrum last.

    http://en.wikipedia.org/wiki/Ontogeny_and_phylogeny