3D, AIRWAY, ANATOMICAL, ANATOMY, ART, ARTWORK, BACKGROUND, BIOLOGY, BLACK, BODY, BREATHING, DIMENSIONAL, EXCHANGE, GAS, GRAPHIC, HEALTHY, HUMAN, ILLUSTRATION, KAULITZKI, LUNGS, MALE, MAN, NO-ONE, NOBODY, NORMAL, ORGAN, OXYGENATION, PULMONARY, RENDERED, RESPIRATION, RESPIRATORY, SEBASTIAN, SYSTEM, THREE, TRACHEA,