Phlegm originates from the lungs. It is different from the mucus that is produced in the nasal passages. A common cause of phlegm is post nasal drip which is a symptom of sinus infections, colds, flu and inhalation of irritants. The diagnosis of the underlying condition could be made from the color of the phlegm.
A flow chart is a type of diagram representing a process using different symbols containing information about steps or a sequence of events. Each of these symbols is linked with arrows to illustrate the flow direction of the process.
Flow Chart Definition. A flowchart is a graphic representation of how a process works, showing, at a minimum, the sequence of steps. Several types of flowcharts exist: the most simple (high level), a detailed version (detailed), and one that also indicates the people involved in the steps (or matrix).