Dislocation : When a bone is displaced from its specific position, then it is said to be dislocated and the phenomenon is called dislocation of bone.
Fractures : A fracture is a complete or incomplete break in a bone resulting from the application of excessive force
Answer the following briefly :
(a) How does a muscle shorten during its contraction and lengthen during its relaxation?
(b) What biological functions are served by the skeletal system ?
(c) Why a red muscle fibre can work for a prolonged period while a white musule fibre suffers from fatigue after a shorter work ?