Designed to be the best pocket quick reference and refresher on the market offering a lot of information at a great value. The anatomical label text is very small to accomplish this, so those with poor eyesight be warned, this guide is not for you. Perfect for a lab coat or clipboard and a quick check of a body part and location, we pushed the limits of these 6 laminated pages. A laminated, flat trifold measuring 4 by 6 inches adds no weight to the pocket and can be stored practically anywhere. There are over 10 million QuickStudy anatomy guides in print, all with Illustrations by award-winning and best-selling medical illustrator Vincent Perez, whose life mission is cataloging the beauty and detail of our complicated body systems for the medical professional, the formative student and the inquisitive layperson. 6-page laminated guide includes illustrated and labeled: Heart Circulation Schematic Anterior Heart Posterior Heart Thoracic, Neck & Head Arteries & Veins Heart Cut-Away Schematic Beginning of Diastole End of Diastole Systole End of Systole Nerves & Arteries Interior View Coronary Arteries & Cardiac Veins Heart in Diastole Heart in Systole