The sympathetic nervous system, which enables the fight-or-flight response, was thought to be present only in jawed vertebrates. Analysis of a jawless vertebrate suggests that this system might be a ...
With terrifyingly sharp teeth arranged around a circular mouth, lampreys look about as primitive a vertebrate as you could imagine. But a new study finds that the animals have a surprising similarity ...
In 'water vampires,' scientists find evidence of stem cells that develop into the sympathetic nervous system. By Laura Baisas Published Apr 19, 2024 11:31 AM EDT Get the Popular Science daily ...
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