"This is the first book (trade text) written by a physiologist for the generally-educated public on a topic of vast interest (our bodies). It represents the third book in a series written by Dr. Merrill. The ten chapters that comprise the book illustrate examples of how the major organ systems solve problems they are confronted with. For example, when more blood flow is needed by one organ to perform a demanding physical activity (e.g. pleasurable jogging or competitive marathoning) where does the additional blood flow come from? The body has solved this problem by the intelligent behavior of the cardiovascular system. It can distribute/redistribute blood, oxygen, and nutrient supplies to actively performing skeletal muscle by diverting them, temporarily, away from other organs/tissues (e.g. gut, liver, kidneys, etc.) that are relatively less important at the time. The kidneys are another marvelous example of intelligent problem solving by our bodies. For example, they are charged with the continuous responsibility of balancing body water and body salt content. They do this, in part, by regularly assessing salt concentrations in the three main body water compartments (intracellular, interstitial, intravascular). They also complete the task by evaluating the fullness of the circulatory system and determining when it is too full, when it lacks adequate volume, and when it is in a stable steady state. This is important because we are constantly losing and gaining water and salts without even thinking about it. Those who have already read and enjoyed Our Marvelous Bodies (RUP, 2008), Our Aging Bodies (RUP, 2015) will want to read Our Intelligent Bodies (RUP, 2020)"--