Cnidarians and ctenophores have morphologically simpler nervous systems than those of bilaterians. Discovery and characterization of neuropeptides in a comb jelly and a sea anemone support a common origin of animal peptidergic neurons from digestive cells that could sense their environment.

中文翻译：

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神经元起源的神经肽

刺胞动物和栉水母的神经系统在形态上比两侧动物更简单。梳状果冻和海葵中神经肽的发现和表征支持了动物肽能神经元的共同起源，这些神经元来自能够感知其环境的消化细胞。