physiology

Explains how a girl's body changes during puberty, discussing the menstrual cycle, breast development, hormonal activity, and emotional changes.

Informative text, photographs, and real-life stories describe eye injuries and diseases that cause blindness and how they are treated and offer tips on eye safety.

Describes how the human respiratory system works and discusses such related topics as yawning, hiccuping, and coughing.

Describes how the human circulatory system works and discusses such related topics as blood pressure, bruising, and shivering.

Presents an alphabet book that describes twenty-six big things that small hands do such as build things, give gifts, and help others.

Explanatory text and workbook exercises present information about such aspects of male puberty as penis size, masturbation, and acne.

An illustrated natural history guide for young readers discussing how animals' heart, blood, brain, muscles, and bones function, how animals work, and animal senses.

Discusses the heart, arteries, veins, blood, and other parts of the body's circulatory system and the causes and prevention of coronary heart disease.

Introduces young readers to a number of dangerous ocean creatures including the Portuguese man-of-war, the stonefish, and the gray reef shark.

Photographs and text provide information on the physical characteristics and behaviors of dolphins.