1 — Posterior papillary muscle; 2 — Chordae tendineae; Tendinous cords; 3 — Tricuspid valve; Right atrioventricular valve, posterior cusp; 4 — Tricuspid valve; Right atrioventricular valve, anterior cusp; 5 — Tricuspid valve; Right atrioventricular valve, septal cusp; 6 — Septal papillary muscle; 7 — Interventricular septum; 8 — Anterior papillary muscle; 9 — Septomarginal trabecula; Moderator band; 10 — Interventricular septum, muscular part; 11 — Interventricular septum, membranous part; 12 — Interatrial septum; 13 — Mitral valve; Left atrioventricular valve, anterior cusp; 14 — Commissural cusps; 15 — Left atrium; 16 — Mitral valve; Left atrioventricular valve, posterior cusp; 17 — Apex
of heart
