D ISORDERS OF THE E XCRETORY S YSTEM Malfunctioning of kidneys can lead to accumulation of urea in blood, a condition called uremia , which is highly harmful and may lead to kidney failure. In such patients, urea can be removed by a process called hemodialysis . During the process of haemodialysis, the blood drained from a convenient artery is pumped into a dialysing unit called artificial kidney . Blood drained from a convenient artery is pumped into a dialysing unit after adding an anticoagulant like heparin.
The unit contains a coiled cellophane tube surrounded by a fluid (dialysing fluid) having the same