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Animals without Backbones
     

Animals without Backbones

by Bobbie Kalman
 

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Children's Literature - Marilyn Courtot
Animals without backbones are called invertebrates; surprisingly, there are millions of such creatures on our planet. Many of these animals have shells, while others have exoskeletons. Animals in these categories can be found on land and in the oceans. Some (e.g., sponges, sea anemone) look like plants, but are really animals. Earthworms are another such kind of animal; they have a soft skeleton that is filled with liquid, and this combines with the segmentation of their bodies to let them slide through the earth. In this way, they perform a very important function: aerating the soil. On the other hand, feather-duster worms live in the ocean and have feathery cilia on their bodies. They use the cilia to trap food that is floating in the ocean. Arthropods are another group of invertebrates; these have their exoskeletons on the outside of their bodies. Insects also fall into this category. This book has an interesting "Did You Know?" section, plus a glossary and an index. It is packed with a lot of information and filled with beautiful, full-color photographs. Reviewer: Marilyn Courtot

Product Details

ISBN-13:
9780778732990
Publisher:
Crabtree Publishing Company
Publication date:
09/30/2008
Series:
Big Science Ideas Series
Pages:
32
Sales rank:
1,343,971
Product dimensions:
8.20(w) x 9.30(h) x 0.20(d)
Lexile:
IG630L (what's this?)
Age Range:
8 - 11 Years

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