Heya!
Muscles are the group of tissues present in every eegion of the body, with one main role, to aid in locomotion (or) movement.
How are they responsible ?
These muscles are popularly classified into two - biceps and triceps. Theuly are attached to the bones by means of tendons and ligaments.
When a body, like human, moves, then these muscles give energy to the bones by supporting and covering them at 360°.
Also, these muscles are flexible.
This aids the bones by giving them a central position, thereby giving it enough space to change its position as the person moves.
~ Benjemin360