-- Investigates nature's hidden processes -- Outlines the most important functions of the human body and plant life in fascinating detail -- Exceptional color illustrations -- Includes an experiments section Explains the digestive process in clear, simple terms.

What enables us to hear, see, smell, taste, and touch? This volume explores the human sensory system and its different organs.

Provides a complete introduction to plant life in climates ranging from the desert to the rain forest.

-- Investigates nature's hidden processes -- Outlines the most important functions of the human body and plant life in fascinating detail -- Exceptional color illustrations -- Includes an experiments section Contains a complete introduction to the male and female reproductive systems.

-- Investigates nature's hidden processes -- Outlines the most important functions of the human body and plant life in fascinating detail -- Exceptional color illustrations -- Includes an experiments section Provides an introduction to the important roles that bones play in the body.

-- Investigates nature's hidden processes -- Outlines the most important functions of the human body and plant life in fascinating detail -- Exceptional color illustrations -- Includes an experiments section Follow the route air takes when it enters and leaves our bodies.