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Diagram of a child's nasal passages, sinuses, and throat

© Copyright Alessandra Kelley

Cross-section of a child's sinuses and throat in black and white pencil by Alessandra Kelley

This drawing of the internal anatomy of a child's nasal passages, sinuses, and throat, was for "Darwinian Dentistry Part 2: Early Childhood Nutrition, Dentofacial Development and Chronic Disease," by Kevin L. Boyd, M.Sc., DDS, Journal of the American Orthodontic Society, March/April 2012.

The technique is graphite pencil on paper.