Extremely informative and clearly written, directed at the layman which is useful (I'm a biologist myself, but all I know about is plants). A really very well done example of science communication.

I do think the title is inadequate, though. Much of this book is evolutionary biology, describing how specific organs developed and the similar features found in other organisms at other times. The chapter on the lungs, for example, talks about fish and frogs as well as humans. In some ways this book feels like an inspiration for Dawkins' The Ancestor's Tale, which I was reminded of while reading - but though I prefer the Dawkins book, the Asimov one is still very good indeed.