San Francisco-based designer Cameron Drake recently created a series of fascinating x-ray GIFs of the human anatomy in motion.
The looping animations show a human hand clenching and unclenching, a flexing shoulder, and a moving elbow.
Check them out below.
Elbow
Shoulder
Wrist & Hand
Knee
Foot & Ankle
[via Boing Boing, GIFs via Cameron Drake]