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Bizarre blob-like animal may hint at origins of neurons


A sea animal so simple that it looks like a blobby pancake may hold the secret to the origin of neurons.

Placozoans are one of the five major branches of animals, along with bilaterians (which include everything from worms to humans), cnidarians (corals and medusas), sponges and ctenophores (comb jellies). They’re the most basic of the bunch, consisting of millimeter-long blobs of cells without organs or body parts. They move through the water using cilia — tiny hair-like structures — absorb nutrients by engulfing particles, and reproduce by simply budding off new offspring.

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