There are, within the human body, four major systems upon which the entire body is dependent for proper functioning: the skeletal and muscular framework, the nerve system, the digestive system, and the circulatory systems.
(the entire body; is; dependent for proper functioning; L:within the human body) (the entire body; is dependent for; proper functioning)
the entire body the entire body
is is dependent for
dependent for proper functioning L:within the human body
proper functioning