1 12:46Class: Chondrichthyes The shark’s skeleton is entirely composed of cartilage. The skin is covered…

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3 Their large liver may help detoxify their diet. It is unusual that they are somewhat resistant to tumors and cancer. Mote Marine Laboratory in Sarasota, FL is a leading research center in shark immunology. However, shark cartilage does not prevent cancer in humans, and sharks with tumors have been observed.