This nonfiction book covers a wide range of systems – circulatory and respiratory systems in your body, transportation and communication systems in your town, plumbing and heating systems, our solar system, and ecosystems.  The focus of each system description is different.  Origin of the system, significance of the system to humans, human role in the system, and the impact if part of the system is removed are addressed with discussions of a specific system.  Text is supported by color photographs.  Animated Space Cat narrates “Did You Know?” and “Try It!” inserts on each 2 page spread.  Interesting approach.