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-- 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.

-- 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.