physiology

Discusses the sense which enables some animals to detect their prey, search for food, signal danger, or find their way back to where they had been long ago.

Explains the sense of touch including information on the function of the skin, how the body measures and feels temperatures, how it responds to pain, and the sensitivity of whiskers.

Explores the sense of taste and how it functions in various animals, birds, insects, and fish.

Explains how muscle and bones work together to help the human body move, in simple text with illustrations, providing information the skeletal system, muscles, nerves, and more.

Describes the ways in which certain animals, such as snakes, dogs, weevils, moths, elephants, and owls, use their noses to pick up scents and breathe.

Introduces the unique ears of bats, mosquitoes, owls, frogs, grasshoppers, shrews, and rabbits.

Explains each step of the digestive process.

Explores the sense of touch throughout the animal kingdom, examining how it works in mammals, birds, fish, insects, and humans.

Presents information from a Christian perspective on a variety of topics for teenage boys, including steroids, alcohol use, body changes, tattoos, pornography, sexual behavior, and more.

Describes the physical and emotional changes that occur in boys (and, to a lesser extent, in girls) during puberty and discusses sexual activity, homosexuality, AIDS, and other related topics.