How do muscles change their shape - Science - Control and Coordination

Question

How do muscles change their shape?

Mrinali ÇhÂrhÀtĒ · Accepted Answer

The muscle cells move by contraction and relaxation by utilizing
the energy in the form of ATP Muscle contraction is initiated by
the signal sent by the CNS to the muscle fibres During contraction,
the muscles fibres shorten, the muscle pulls on the ligaments that
connect the bones and the movable body parts During relaxation the
muscle fibres come to their original position This movement of
muscles cells or the muscle fibres results in the movement of the
body parts