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Something fishy…


xyz48B
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What is the most interesting thing you learned recently? I’ll share mine to get started…

 

“Fish can’t talk, but they do have gills—and that’s where our voices come from. Just like fish, human embryos have gill arches (bony loops in the embryo’s neck). In fish, those arches become part of the gill apparatus. But in humans, our genes steer them in a different direction. Those gill arches become the bones of your lower jaw, middle ear, and voice box.

 

Hiccups are triggered by electric signals generated in the brain stem. Amphibian brain stems emit similar signals, which control the regular motion of their gills. Our brain stems, inherited from amphibian ancestors, still spurt out odd signals producing hiccups that are, according to Neil H. Shubin, PhD, Professor of Organismal Biology and Anatomy, essentially the same phenomenon as gill breathing.”

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