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"Right and left coronary arteries, emerging from the origin of the aorta, veins of the heart and coronary sinus." illustration by J. M. Bourgery from Atlas of Human Anatomy and Surgery / Atlas d'antomie Humaine et de Chirurgie
Resin cast of human heart blood vessels. This model was achieved by injecting liquid plastic into a real heart. The plastic resin fills the blood vessels and, once the resin sets, the tissue is dissolved away leaving a perfect replica of the blood supply.
ANATOMY: Chordae Tendineae (Heartstrings). The chordae tendinae are strong, fibrous strings attached to the cusps of the heart on the ventricular side. These strings originate from small mounds of muscle tissue – the papillary muscles – which project inward from the walls of the ventricle. When the cusps close, the chordae tendinae prevent them from swinging back into the atrium cavity.