In more complex vertebrates, this system then diversified, expanded and grew larger, he says. Previous studies had already begun to dismantle the idea of a simple nervous system in lampreys.

But their mostly see-through bodies cloak a nervous system unlike that of any other known animal, researchers report in the April 21 Science.

Primitive animals called comb jellies can fuse their bodies and nervous systems together. Comb jellies split from the ancestors of all other living animals about 700 million years ago and have ...

New fossil discovery sheds light on the early evolution of animal nervous systems Groundbreaking research uncovers the origins of the ventral nerve cord in early moulting animals Date: January 13 ...

This is an accurate description of a photograph that shows the first complete human nervous system dissection — a feat that was accomplished by Philadelphia anatomist Rufus B. Weaver in 1888.