Dolphins and Sharks by Mary Pope Osborne

Author:Mary Pope Osborne [Osborne, Mary Pope]
Language: eng
Format: epub
ISBN: 978-0-307-97527-0
Publisher: Random House Children's Books
Published: 2012-02-29T05:00:00+00:00

The sides of your nose and ears are made out of cartilage.

Cartilage feels like bone, but it’s not as hard. Because cartilage is more flexible, sharks can turn quickly in the water.

Cartilage is also lighter than bone. This makes it easier for sharks to swim.

Teeth

Sharks have a lot of teeth. Many have five rows of teeth at a time. It’s a good thing they have so many teeth because they’re always losing them! Adult sharks go through thousands of teeth in their lifetime. When one falls out, a back tooth moves forward to replace it.

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