physiology

Describes the heart, blood, and other parts of the body's circulatory system and explains how each component functions.

"Discusses body changes that happen to girls during puberty, such as acne, periods, cramps, body hair, mood swings, and more, and gives suggestions to teen girls for taking care of their health"--Provided by publisher.

"Discusses body changes that happen to boys during puberty, such as acne, body hair, body odor, mood swings, crushes, and more, and gives suggestions to teen boys for taking care of their hygiene and keeping good relationships"--Provided by publisher.

Presents a guide to puberty for girls, providing information on its physical and emotional changes, including a discussion of nutrition and exercise, hygiene, the reproductive system, the period, relationships, and more.

Offers adolescent boys advice on how they can prepare for the emotional and physical changes they will experience during puberty.

Presents detailed, illustrated information for young girls on puberty, discussing breast growth, pubic hair, the genital organs, menstruation, acne, body odor, weight gain, and body image, Includes questions girls frequently ask.

An illustrated exploration of the circulatory system that follows a red blood cell through the body, describing each part and its function.

Text and color photographs discuss various parts of trees and their functions, including the bark, sapwood tubes, roots, and leaves.

Describes the physical characteristics and behavior of dogs, pointing out ways in which they differ from people.

Discusses how different animals use their senses to find food, attract a mate, detect danger, bond with their young, and more.