Ultra-realistic 3D medical animation. The camera is inside the left ventricle of the heart. The massive, powerful cardiac muscles contract violently, pumping blood out. The heart valves, looking like intricate parachutes, slam shut with immense force. The scene is powerful and rhythmic. Off-screen voiceover (all characters have their mouths closed, no one is speaking on screen): Narrator: "ЛОК...
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