Human Heart Anatomy Diagram - Labeled Chambers, Valves, and Vessels #1985691 (License: Personal Use)

This vintage-style line illustration depicts a sagittal cross-section of the human heart, highlighting structural components such as the right atrium (r.a.), left atrium (l.a.), right ventricle (r.v.), left ventricle (l.v.), superior vena cava (s.v.), inferior vena cava (p.v.), pulmonary veins (p.v.), aorta (a.), and ductus arteriosus (d.a.). Key features include the interatrial and interventricular septa, semilunar and atrioventricular valves (shaded in black), and coronary circulation pathways (pre.c., post.c., j.). The diagram uses standard anatomical abbreviations common in early 20th-century medical texts.

Used in medical textbooks, anatomy courses, or educational websites to teach cardiovascular structure; serves users seeking foundational knowledge of heart physiology or preparing for exams like USMLE or NCLEX.