how to make a working model of dialysis???

Dialysis is a procedure that is a substitute for many of the normal duties of the kidneys like filtering of wastes in case of kidney failure.

• Healthy kidneys remove excess of fluid, wastes, and minerals from the body.
• If the kidneys fail to function, wastes may accumulate in the body, the body may retain excess fluid, and blood pressure may rise. This can even lead to death.
• In such a case, an artificial kidney or hemodialysis is useful. 
• In hemodialysis, only a few drops of blood are allowed to flow, through a special filter that removes wastes and extra fluid.
• The detoxified blood is then returned to the body. 
• The special filter used in dialysis consists of a number of tubes with semi-permeable lining, suspended in a tank filled with the dialysis fluid.