the skeletal system is malleable, it's a kinetic string of …

the skeletal system is malleable, it's a kinetic string of bones that move in relation to each other.
So many variables depending on how they all connect. The bones are the frame, alter one a fraction of a mm and the rest move as well.
The skull has moving parts, the pelvis has moving parts - the spine is a series of moving parts, a chain of vertebrae that links the head with shoulders which moves the arms... to the pelvis, which in turn moves the legs.
The human body is a true source of wonder.
For me anyway :)