Severe injury to the central nervous system of chordates often results in permanent and irreversible mental and physical challenges. While some chordates are able to repair and/or regenerate portions ...
Schizocardium californicum as a larva, juvenile and adult. In the larval stage, S. californicum is little more than a swimming head. Disclaimer: AAAS and EurekAlert! are not responsible for the ...
Porifera : the sponges ; Cnidaria (coelenterata) / Steven Sadro -- Platyhelminthes : the flatworms with an emphasis on marine Turbellaria / Alan L. Shanks -- Nemertea : the ribbon worms / Keven B.
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