Sea Squirt Regrows Entire Body from One Blood Vessel

Our closest invertebrate relative, the humble sea squirt, can regenerate its entire body from just tiny blood vessel fragments. The entire regeneration process, which in part resembles the early stages of embryonic development, can produce an adult sea squirt in as little as a week. The finding could illuminate not only the evolutionary origins of regeneration in all organisms, but also subsequent changes to it during vertebrate evolution

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