Human Heart Musculature Diagram - Atrial & Ventricular Anatomy #2268182 (License: Personal Use)

This anatomical diagram illustrates the layered, spiral organization of cardiac muscle-specifically the atrial musculature (superficial layer) and ventricular musculature (deep, helical layers). White arrows indicate the direction of blood movement through chambers during contraction, emphasizing how muscle fiber orientation supports efficient ejection. The image includes key vascular connections like the aorta and pulmonary artery for spatial context.

Used in medical education, cardiology resources, and physiology textbooks to explain myocardial architecture and hemodynamics; targets students, healthcare professionals, and patients seeking to understand heart function.