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Are humans the only animals to have belly buttons?

Discussion in 'Off Topic [BG]' started by Jim Nazium, May 15, 2010.


  1. Jim Nazium

    Jim Nazium Supporting Member

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    If yes, why? :confused:

    If no, post pics. :eyebrow:
     
  2. champbassist

    champbassist

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    New Delhi, India.
    From 'Kipedia: The navel (clinically known as the umbilicus, also known as the belly button) is a scar on the abdomen, caused when the umbilical cord is removed from a newborn baby. All placental mammals have a navel. It is fairly conspicuous in humans.

    Here's further explanation for monkeys: http://www.monkeymatters.com/articles/buttons/buttons.htm
     
  3. jobu3

    jobu3 Artist formerly known as Big Joe Supporting Member

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    Scranton, PA
    My pug has a belly button.

    I won't take a picture of it and post it on the net... she's got some body image issues since she's gained a few pounds.
     
  4. champbassist

    champbassist

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    Didn't notice you asked for pics OP:

    Cat
    [​IMG]

    Horse with an outie button:
    [​IMG]

    This is starting to feel like a bestial navel fetish thread.
     
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  6. BassyBill

    BassyBill The smooth moderator... Supporting Member

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  7. tjmdetroit

    tjmdetroit

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    I suppose this is the next question ... then why do guys have teats...boobs....nips?
    Like my dad frequently said, "your as useful as tits on a bull".
    NO PICS PLEASE....:help:
     
  8. nsmar4211

    nsmar4211

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    All mammals have em, they just get covered in fur and harder to see. And all male mammals have teats too. Again, covered in fur and hard to see. Don't worry.......no pics of those :)

    Umbilical cord = belly button
     
  9. line6man

    line6man

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  10. Stanley Design

    Stanley Design

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    We have nipples because we originally start off as a female in the womb and then develop into a male.
     
  11. BassyBill

    BassyBill The smooth moderator... Supporting Member

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    Sorry, but that answer is not biologically accurate. Your gender is determined at the moment of conception, so males do not "start off" as females. But it is true that embryos develop in stages, and so some male charcteristics will develop after other anatomical features.

    http://www.scientificamerican.com/article.cfm?id=why-do-men-have-nipples

    The very best discussion of this I ever read was an essay entitled "Male nipples and clitoral ripples" by Stephen Jay Gould, but I couldn't find an online version with a quick search.
     
  12. tjmdetroit

    tjmdetroit

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    From the article that BassyBill referenced......

    "Like all "why" queries, the question of why men have nipples can be addressed on many levels. My four-year-old daughter, always suspicious of a trick when asked such obvious questions, answered: "because they grow them." In search of the trick answer, she quickly added that "chests would also look pretty funny with just hair.""
    [​IMG]
    Out of the mouth of babes....lol;)
     
  13. Gopherbassist

    Gopherbassist

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    Because for animals to mate, they have to have the same or equivalent organs in all places.

    Well, at least that's what my 7th grade science book said on the subject. It always sounded like BS to me, but I could never find more information on it, for or against.

    Edit: Actually, after two minutes of thinking about this, it makes sense. Our DNA comes in two halves, both of which must be compatible. All traits must be accounted for, but how they show up is defined by the different ways they're written.
     
  14. chondro776

    chondro776

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    I am off to look through text books to decipher the difference in opinion of gender/zygotes. Because, I would have given the same 'inherent female' answer as above.

    I am pretty sure all vertebrate embryos are inherently female, and only transition to male after the hormones (brought on by the gender producing chromosome, or temperature range as in TDSD) prime the cell to become male.

    But maybe I am wrong....I will look for links....
     
  15. MonetBass

    MonetBass ♪ Just listen ♫ Supporting Member

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  16. guitar ed

    guitar ed

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    Not all navels & teats are covered by hair, as not all mammals have hair. Such as dolphins. And yes, dolphins do have navels. I have seen one up close & personal.

    edg
     
  17. BassyBill

    BassyBill The smooth moderator... Supporting Member

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    Dolphins have hair on their nose and around the blowhole (as babies). But not around the navel, no.
     
  18. john turner

    john turner You don't want to do that. Trust me. Administrator

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  19. BassyBill

    BassyBill The smooth moderator... Supporting Member

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  20. MatticusMania

    MatticusMania LANA! HE REMEMBERS ME!

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    The real question here is 'Do other animals collect lint in their bellybuttons like I do?'

    I could probably knit a sweater or two from all the lint Ive pulled out of there.
     
  21. Gard

    Gard

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    General Manager, Roscoe Guitars
    You call me?

    :)
     

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