A United States Navy enlisted rank indicates where an enlisted Sailor stands within the chain of command, and also defines one's pay grade. An enlisted sailor's rate is similar conceptually to a naval officer's rank. Only Naval Officers carry the term rank in the Navy.
Muscular system is the system of Human Body that provides motor power for all movements of body parts. Muscular system is composed of special tissue called muscular tissue. Muscles have the ability to contract actvely to provide the force for movements of body parts.
Functions of the Muscles. The Human muscular system is made up of a complex network of soft tissues which are called muscles. Muscle tissue is found throughout the human body and it has the following functions; 1  Movement. 2  Skeletal muscles attached to the skeleton move the body by moving bones.