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.
How to plan and draw a basic flowchart. 1  Define your purpose and scope. 2  Identify the tasks in chronological order. 3  Organize them by type and corresponding shape, such as process, decision, data, inputs or outputs.  Draw your chart, either sketching by hand or using a program such as Lucidchart.