A 3D interactive model of a human heart built with Three.js and animated via requestAnimationFrame. The model uses color-coded spheres and cylinders to represent anatomical parts, including the left and right ventricles, atria, aorta, and pulmonary artery, each with an associated function. Users can orbit the heart using OrbitControls, and a mousemove event with Raycaster enables hover highlighting and logs part names to the console. The scene includes directional and ambient lighting, with a camera initial position of z=15.