The skeleton plays an important part in martial arts.
It gives structure to the soft tissue.
If you cut it down or across the middle you can see it’s symmetry, therefore you can see the importance of left and right and upper and lower body harmony for balance, mobility and power.
When balanced and the soft tissue around the joints has no excessive tension the joints are unlocked, loose and aid mobility.
To destructure an opponent and make him lock his own skeleton up you only have to make any part collapse, protrude or lean out of alignment.