Frontal view anatomical diagram of the human heart, clearly labeled left atrium, right atrium, left ventricle, right ventricle, aorta, pulmonary artery, highly detailed and precise structures, minimalist medical style, pure white background, no extraneous elements, compliant with professional medical anatomy standards, clean fine lines, high contrast, vector art style, centered rule of thirds composition, eye-level camera angle, calm and professional mood, 1024x1024 resolution