{"aspect_ratio":"1184:896","high_level_description":"A high-definition educational textbook illustration detailing the anatomy and structure of the human heart, featuring a large central cross-section diagram with precise labels, flow arrows, and smaller auxiliary diagrams on a clean white grid background.","compositional_deconstruction":{"background":"A clean white textbook page background with a subtle, light grey fine alignment grid. The overall layout is organized and academic, optimized for high-quality printing with ample whitespace around the structured diagrams.","elements":[{"type":"obj","bbox":[120,300,720,700],"desc":"Anatomically accurate, large cross-section diagram of the human heart at the center of the page. Shows muscular walls, chambers, and major blood vessels in detailed textbook illustration style. Oxygenated blood flow is colored bright red, deoxygenated blood flow is deep blue, and directional arrows indicate the path of circulation."},{"type":"obj","bbox":[150,50,400,280],"desc":"A small auxiliary diagram showing a simplified schematic of the human circulatory system, illustrating the systemic and pulmonary loops with red and blue pathways connecting a stylized heart and capillary beds."},{"type":"obj","bbox":[450,50,700,280],"desc":"A small auxiliary diagram demonstrating the mechanism of cardiac valves, showing a close-up cross-section of a valve in its open and closed positions with small arrows indicating fluid pressure."},{"type":"obj","bbox":[150,720,320,950],"desc":"A small auxiliary diagram illustrating the cardiac conduction system, highlighting the sinoatrial node, atrioventricular node, and Purkinje fibers with bright yellow lines overlaid on a smaller heart silhouette."},{"type":"text","bbox":[40,300,70,180],"text":"Aorta","desc":"Label text pointing to the aorta. Clean, highly legible sans-serif typeface, regular weight, dark grey color, connected to a thin straight leader line with a small dot anchoring to the vessel."},{"type":"text","bbox":[100,720,130,850],"text":"Pulmonary Artery","desc":"Label text pointing to the pulmonary artery. Modern sans-serif font, regular weight, dark grey color, connected by a fine straight pointer line to the vessel."},{"type":"text","bbox":[200,740,230,860],"text":"Left Atrium","desc":"Label text pointing to the left atrium. Clean sans-serif typography, dark grey color, linked via a thin leader line directly to the chamber."},{"type":"text","bbox":[280,730,310,850],"text":"Pulmonary Veins","desc":"Label text pointing to the pulmonary veins. Modern sans-serif text, dark grey color, connected to the veins with a fine pointer line."},{"type":"text","bbox":[380,710,410,820],"text":"Mitral Valve","desc":"Label text pointing to the mitral valve. Small sans-serif font, dark grey color, connected with a thin straight leader line."},{"type":"text","bbox":[460,700,490,810],"text":"Aortic Valve","desc":"Label text pointing to the aortic valve. Small, crisp sans-serif text, dark grey, with a fine pointer line."},{"type":"text","bbox":[560,680,590,790],"text":"Left Ventricle","desc":"Label text pointing to the left ventricle. Clear sans-serif typeface, dark grey, with a thin pointer line targeting the lower right chamber."},{"type":"text","bbox":[250,150,280,270],"text":"Superior Vena Cava","desc":"Label text pointing to the superior vena cava. Crisp sans-serif text, dark grey, connected by a thin straight leader line."},{"type":"text","bbox":[350,140,380,250],"text":"Right Atrium","desc":"Label text pointing to the right atrium. Clear sans-serif font, dark grey color, with a thin pointer line to the upper left chamber."},{"type":"text","bbox":[440,160,470,280],"text":"Tricuspid Valve","desc":"Label text pointing to the tricuspid valve. Small sans-serif typography, dark grey, linked via a fine leader line."},{"type":"text","bbox":[520,170,550,300],"text":"Pulmonary Valve","desc":"Label text pointing to the pulmonary valve. Small sans-serif font, dark grey, connected with a fine straight line."},{"type":"text","bbox":[640,190,670,300],"text":"Right Ventricle","desc":"Label text pointing to the right ventricle. Clear sans-serif typeface, dark grey, with a thin pointer line targeting the lower left chamber."},{"type":"text","bbox":[740,230,770,360],"text":"Inferior Vena Cava","desc":"Label text pointing to the inferior vena cava. Crisp sans-serif text, dark grey, linked with a fine straight line."},{"type":"text","bbox":[40,40,90,950],"text":"HUMAN HEART ANATOMY & CIRCULATION","desc":"Main title text at the top left of the page. Large, bold modern sans-serif typeface, dark charcoal grey color, cleanly aligned with the grid."},{"type":"text","bbox":[760,50,840,450],"text":"The human heart is a muscular organ that pumps blood throughout the circulatory system. It consists of four main chambers: the right and left atria, and the right and left ventricles. Valvular structures ensure unidirectional flow.","desc":"Main explanatory text block in the upper right. Clean, highly legible sans-serif body text font, dark grey, regular weight, formatted in a neat column with precise line spacing."},{"type":"text","bbox":[760,490,840,900],"text":"Oxygen-poor blood returns from the body via the vena cava into the right atrium, moves to the right ventricle, and is pumped to the lungs. Oxygen-rich blood returns from the lungs to the left atrium, moves to the left ventricle, and is distributed via the aorta.","desc":"Secondary explanatory text block in the lower right, continuing the body text layout in a balanced column, matching the font and color of the upper block."}]}}