What do humans have in common with snakes, elephants, and whales? A skeleton! The numbers of bones may vary, but the purpose is the same—to support and protect all of the organs inside the body. Photographs, illustrations, X-rays, and detailed diagrams of various bones help readers make meaningful connections with the text. Book and lesson also available at Levels R and U.

Additional Resources
ReadingA-Z.com Printable and Projectable Book
VocabularyA-Z.com Lesson