Static data members are not associated with any object. They exist even if no objects of the class have been defined. If the static member is declared thread_local(since C++11), there is one such object per thread. Otherwise, there is only one instance of the static data member in the entire program, with static storage duration. Static data members cannot be mutable.
Definition of MUSCLE for Kids. 1. : a tissue of the body consisting of long cells that can contract and produce motion. 2. : an organ of the body that is a mass of muscle tissue attached at either end (as to bones) so that it can make a body part move.. a: a body tissue consisting of long cells that contract when stimulated and produce motion b: an organ that is essentially a mass of muscle tissue attached at either end to a fixed point and that by contracting moves or checks the movement of a body part. 2.
Muscle is a soft tissue found in most animals. Muscle cells contain protein filaments of actin and myosin that slide past one another, producing a contraction that changes both the length and the shape of the cell. The statement that the tongue is the strongest muscle in the body appears frequently in lists of surprising facts, but it is difficult to find any definition of strength that would make this statement true. 2  Note that the tongue consists of eight muscles, not one.