• Question: Why do Humans have 2 nostrils?

    Asked by dognut99 to Ed, Hayley, Jason, Nathan, Sophie on 18 Mar 2013. This question was also asked by luvinscience1202.
    • Photo: Hayley Evers-King

      Hayley Evers-King answered on 18 Mar 2013:

      Symmetry – if you look, we have two eyes, two arms, two legs, two lungs, two kidneys etc, as do many other creatures. This symmetrical approach to body structure seems to have been something that came about very early in evolutionary history and has stayed.

    • Photo: Nathan Green

      Nathan Green answered on 18 Mar 2013:

      I dont think theres a definite answer to this. Having two nostrils is handy when one of them is blocked. You might notice that at any one time theres always a dominant nostril! They dont work the same all the time.

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