An introduction to biology for elementary graders discusses in clear terminology the complicated processes of respiration, nutrition, circulation, anatomy, the nervous system, reproduction and the interrelation of all these bodily functions in maintaining health and achieving growth. Sounds encyclopedic? Well, it isn't. Charles Gramet describes the basic functioning of the human body with an accent on selectivity. How our living pump, cell engines, chemical factories and sentries operate, what they require, serve to demonstrate the wonder of the human mechanism, compared throughout the book to an engine with many intricate parts. This is an overview, with enough detail to challenge the beginner, enough comprehensive facts to unify the subject.