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.
Gallery of 3 Main Muscle Types in the Human Body. The muscles of the human body are responsible for movement; there are some 700 named muscles in the body, and other smaller muscle tissues that are part of the heart, blood vessels and internal organs.