I’ve been reading Microcosmos, and it mentioned briefly that during development human embryos have what appear to be “gill arches” that later become things quite different from gills, of course.
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Mon, 02/14/2011 - 7:04pm
I’ve been reading Microcosmos, and it mentioned briefly that during development human embryos have what appear to be “gill arches” that later become things quite different from gills, of course.