Those dry bones are introduced here as a vital living system in this fifth book in the author's solid series on physiological processes. There is a three page chart which desinagtes the 206 bones which comprise the adult skeleton, otherwise the author has avoided the tedium of teaching about bones through lists of technical names. Instead the emphasis is on the title's Your, with explanations based on what you can observe about yourself and others around you. How bones grow and change, what they are made of, the different ways they function, what can be learned from excavated bones, are among the topics covered here succinctly but informatively. There are numerous helpful diagrams, but the other illustrations seem irrelevant without being eyecatching.