Explains how the respiratory organs work, how oxygen is circulated through the bloodstream and waste is exhaled, and some common breathing difficulties.
After Sean gives a yawn, it gets passed along to a series of animals, each revealed by a page turn, until Nellie the elephant decides it is time for bed.
There is an ever present need for a text -- not a heavy academic textbook -- on human anatomy and physiology for those who are interested in the workings of the human body.
