[abdelfatahdroesh]

The spirit is the secret, by which man is alive, acts, sees, hears, moves, learns and works. If the soul leaves the body partially, most human body’s systems stop and only few ones continue working to keep his life like the heart and respiratory system. This happens when man is asleep, but if the soul leaves the body totally, all human body’s systems
http://www.fawzyabuzeid.com/en/table_books.php?name=Book_Questions_of_Non-Muslims&id=49&cat=2