Hand-drawn anatomical illustration of a human heart and lungs with pulmonary arteries in blue and aorta in white/gray, on a neutral background.

Hand-drawn, medical anatomical illustration of the human heart and lungs in frontal view. The heart and lungs are shown schematically in soft gray and white tones. The pulmonary trunk (truncus pulmonalis) originates correctly from the right ventricle and is colored blue only. It divides anatomically correctly into the right and left pulmonary arteries, which are also blue and extend into both lungs. The aorta originates correctly from the left ventricle and is colored entirely white, including the ascending aorta, the aortic arch (arcus aortae), and the descending aorta. The aortic arch must be white and must NOT be blue. No labels, no arrows, no text. No colors other than blue for the pulmonary arteries and white/gray for the heart, lungs, and aorta. Style: clean hand-drawn medical textbook illustration, high anatomical accuracy, neutral white background. Realistic anatomical proportions of the great vessels, correct spatial crossing and layering of the pulmonary trunk and the aorta, clear separation of vessels without any color mixing, medically accurate vessel origins and pathways. negative prompt: blue aorta, blue aortic arch, incorrect vessel origins, pulmonary artery arising from left ventricle, mixed vessel colors, stylized or cartoon anatomy, simplified anatomy See more