What do you mean by the term Chondrichthyes??????
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Chondrichthyes is a class that contains the cartilaginous fishes: they are jawed vertebrates with paired fins, paired nares, scales, a heart with its chambers in series, and skeletons made of cartilage rather than bone. The class is divided into two subclasses: Elasmobranchii and Holocephali.
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It is a class that contains cartilaginous fishes they are jawed , vertebrate with pair fins, scales ,a heart with Chambered series skeleton made of cartilage rather than bones.
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