Question

bones cannot move by themselves.so how do we bend our elbow

Answer 1

there is a special type of joint in our elbows named PIVOTAL JOINT
It can help in movements

it is also present in our legs

HOPE IT HELPS☺️☺️

Answer 2

it is right that we can not move our bones but they make movement due to muscles and tendons attached to them also bones have socket joints due to which movements occurs.