Question

arrange the following based on the procedure of haemodialysis; patients artery, adding antiheparin,dialyzing unit,adding heparin, patients vein​

Answer 1

Answer:

The dialysis unit has a coiled semi permeable cellophane tube.

In haemodialysis, 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 composition as that of plasma except for the nitrogenous wastes. The porous cellophane membrane of the tube allows the passage of molecules based on concentration gradient. As nitrogenous wastes are absent in the dialysing fluid, these substances freely move out, thereby clearing the blood. The cleared blood is pumped back to the body through a vein after adding anti-heparin to it.

Answer 2

Answer:

patient's artery

↓

adding heparin

↓

dialyzing unit

↓

adding anti heparin

↓

patient's vein

This is the required order. In the dialysing unit, the blood exchanges nitrogenous wastes with the dialysing fluid and then it is mixed with the coagulant anti-heparin and pumped back through a vein.