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Right side of the heart-laid open. Labels: 1, right ventricle; a, its external wall; b, carneae columnae; c, great moderator band; d, origin of pulmonary artery; e, sigmoid valves; 2, right auricle; a, foramina Thebesii and musculi pectinati; b, opening of anterior, and c, of posterior vena cava.

Heart of a Horse

Right side of the heart-laid open. Labels: 1, right ventricle; a, its external wall; b, carneae columnae;…

Left side of the heart-laid open. Labels: 1, left ventricle; a, its external wall; b, carneae columnae; c, moderator band; d, mitral valve; d', chordae tendineae; 2, left auricle; a, musculi pectinati; b, opening of pulmonary veins.

Heart of a Horse

Left side of the heart-laid open. Labels: 1, left ventricle; a, its external wall; b, carneae columnae;…

Muscular fibers from the heart of a horse.

Muscular Fibers from the Heart of a Horse

Muscular fibers from the heart of a horse.