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We do not have shark cartilage because then we would be sharks and I do not want to be a shark or have any shark cartilage in me at all.
cartilage is more flexible than bone making the shark more hydrodynamic.
cartilage is not bone it is the skeleton of a shark the shark's body's skeleton is made of cartilage the top of your ear is made of cartilage
the shark has about 85% of the body is cartilage because with out it they can not move as fast or as agile as they are with it
A cartilage fish, such as a shark, is a vertebrate.