(بعض الكلمات الانجليزية صعبة ... لكن افهم المعنى العام ولا تدعها توقفك عن القراءة)    THE SYMPATHETIC NERVOUS SYSTEM   The sympathetic and the parasympathetic nervous system are parts of what is commonly called the autonomic nervous system. (Autonomic = can not be controlled by the mind). You can say that these systems work in balance with each other and directly... [read more]