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A human being loses an average of 70Ð100 strands of hair a day. A sneeze travels at speeds in excess of 100 miles per hour. Fascinating! Human Bodies delves inside the human body and introduces these extraordinary facts and more! --Spectrum(R) Readers are the perfect Common Core aligned tool to support the development of nonfiction reading skills crucial to a young readerÕs success. Each leveled reader features high-interest informational content, exciting full-color photo illustrations and Common Core aligned comprehension practice focused on the development of critical thinking skills. This multilevel series is the perfect addition to any library at school or home.