Build me a human heart in interactive 3D, in one HTML file with Three.js.
Make it look real: the deep red muscle with the red arteries and blue veins on top, and inside it the parts you never get to see. The four chambers, the four valves, the aorta and the pulmonary artery, the veins bringing blood back, and the wiring that sets the beat. The heart beats about once a second, the valves open and close in time, and the blood flows through it, blue going in and red going out. I can drag to orbit around it and scroll to zoom.
Add an Explode button. When I press it, every part slides apart with its name on a label. Press it again and it all snaps back together. When I hover a part, it lights up and shows one line on what it does.
No images. Do not ask me any questions. Just build it.
