Prompt:
A high-end 3D medical animation of a human torso, transparent glass-like skin revealing the spine, ribs, and diaphragm. Split-sequence action. Phase 1 (Inhalation): The diaphragm moves downward, creating a 360-degree posterolateral expansion of the lower ribs. Upward floating arrows lift the compressed spine and upper body, showing structural axial elongation (decompression). Phase 2 (Exhalation): The upper body height is maintained without dropping. The transversus abdominis and lumbar muscles contract inward toward the spine axis, locking in high internal core pressure (IAP cylinder glow). Professional educational studio lighting, clean minimalist 3D render, smooth cinematic motion, 4k.