Human Heart Musculature Diagram - Atrial and Ventricular Anatomy Explained #45677 (License: Personal Use)

The image presents a cross-sectional anatomical view of the human heart, emphasizing the spiral arrangement of cardiac muscle fibers in both atria and ventricles. White arrows illustrate the direction of myocardial contraction-concentric in the atria and helical in the ventricles-to optimize blood ejection. Labels clearly identify atrial musculature (thinner, more superficial) and ventricular musculature (thicker, multi-layered).

Used in medical education, cardiology textbooks, and health websites to explain myocardial architecture and contractile mechanics; targets learners, healthcare professionals, and patients seeking to understand heart function.