The muscular system is the biological system of animals that allows them to move internally and externally. The muscular system in vertebrates consists of three different types of muscles: cardiac[?], skeletal[?] and smooth[?]. Cardiac muscle is a striated muscle[?] that makes up the heart. It is the only type of muscle consisting of branching fibers. Skeletal muscle consists of voluntary muscles[?] attached to the frame of the skeletal system enabling bodily movement. Smooth muscle is the involuntary muscle[?] that enables the movement of internal organs. Movement of all muscles is controlled through the nervous system.
... median age is 28 years. For every 100 females there are 82.8 males. For every 100 females age 18 and over, there are 78.8 males.
The median income for a household in the ...