The sympathetic nervous system arose in the earliest vertebrates

[ad_1]

Nature, Published online: 17 April 2024; doi:10.1038/d41586-024-01017-4

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 feature of all animals with a spine.

[ad_2]

Source link