How our bodies work

Discusses how the heart and circulatory system work, the functions of blood, how doctors help people with blood and heart disorders, and how to keep the cardiovascular system healthy through diet and exercise.

Describes the organs of the respiratory system and their functions and discusses the consequences of disease and prolonged abuse on this vital system.

Compares the human brain to that of other animals, presents historic notions about the brain from prehistoric headhunting to the scientific age, explains how the brain and nervous system function, and describes related disorders, surgical care, and mental health.

Describes the structure and function of the different parts of the human skeleton and how it is able to move with the aid of a system of muscles. Also discusses muscular and skeletal disorders and their treatment.

Discusses the function of the digestive system, the importance of food, and the consequences of poor nutrition.