The stomach of a shark is u shaped
the shark's spiracle has a mild toxin that serves as a defense mechanism
the swim bladder of a shark is filled with dense oil
sharks have keen, steroscopic vision
because of the restriction of space, sharks grow more slowly in captivity
most sharks have 5 to 7 gill slits
most sharks lay eggs
as in humans, the shark's ear regulates a sense of balance
the basic form of the shark is unchanged from prehistoric time
evolution is a slow process, but ever changing
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