Learning that the brain has 100 to 200 billion neurons or that each cell makes 30,000 to 70,000 repairs a day reveals that the title of this series, the Amazing Human Body, is accurate indeed. Complemented with large, colorful photographs and diagrams, each title begins with an overview of the organ or body process and continues with more information about functions and anomalies. Growth and Aging investigates the human attraction of symmetry, the science of twins, and the role of genes and telomeres (long pieces of DNA at the end of chromosomes) in the aging process. A concluding chapter looks at possibilities of the future, including artificial blood and bionic vision. Not your typical health texts.