An introduction to the digestive system. This book introduces readers (Grades 3-5) to the digestive system, including the digestive process, the organs involved in digestion, and common problems and diseases associated with the digestive system.

- Clean new design for easy readability and comprehension
- Updated text presented in a lively, continuous narrative
- New center-spread "sidebar" feature presenting material in a fun, creative way
- Excellent age-appropriate introduction to curriculum-relevant subjects
- "Words to Know" glossary clarifies subject-specific vocabulary
- "Learn More" section encourages independent study
- Index makes navigating subject matter easy

Did you know that a blue whale eats about 50 million calories' worth of krill each day? How about that blue whales' song is louder than a jet engine - so loud that if you heard it above water, it would damage your ears? Or that their eyes are the size of a grapefruit? Perfect for all animal lovers - and blue whale fans in particular - this book is filled with information that young readers will love to learn. From where blue whale habitats are found to what it's like to be a blue whale to why blue whales are endangered and who has been working hard to save them, this gives readers all the facts they need to know to become blue whale experts. Complete with black-and-white photographs, a list of fun blue whale facts, and things that kids can do right this very moment to help save blue whales from extinction, this book, with an introduction by animal advocate Chelsea Clinton, is a must for every family, school, and community library.

- Clean new design for easy readability and comprehension
- Updated text presented in a lively, continuous narrative
- New center-spread "sidebar" feature presenting material in a fun, creative way
- Excellent age-appropriate introduction to curriculum-relevant subjects
- "Words to Know" glossary clarifies subject-specific vocabulary
- "Learn More" section encourages independent study
- Index makes navigating subject matter easy

Polar bears have swum and lumbered their ways into kids' hearts. With this book, readers can become polar bear experts and learn how to save the animals they love. Featuring an introduction from Chelsea Clinton! Did you know that a polar bear's fur looks white only because it reflects the light around it, and that its skin is jet-black underneath? How about that a polar bear can swim constantly for days at a time? Or that male polar bears can weigh as much as ten men? Perfect for all animal lovers—and polar bear fans in particular—this book is filled with all the facts you need to know to become a polar bear expert! Where are polar bears found? What's it like to be a polar bear? Why are polar bears endangered, and who has been working hard to save them? Read this book and find out how you can help save the polar bears! Complete with black-and-white photographs, a list of fun polar bear facts, and things that kids can do right this very moment to help save polar bears from extinction, this book, with an introduction by animal advocate Chelsea Clinton, is a must for every family, school, and community library.

Did you know that a polar bear's fur looks white only because it reflects the light around it, and that its skin is jet-black underneath? How about that a polar bear can swim constantly for days at a time? Or that male polar bears can weigh as much as ten men? Perfect for all animal lovers--and polar bear fans in particular--this book is filled with information that young readers will love to learn. From where polar bear habitats are found to what it's like to be a polar bear to why polar bears are endangered and who has been working hard to save them, this gives readers all the facts they need to know to become polar bear experts. Complete with black-and-white photographs, a list of fun polar bear facts, and things that kids can do right this very moment to help save polar bears from extinction, this book, with an introduction by animal advocate Chelsea Clinton, is a must for every family, school, and community library.