GENERAL HISTOLOGY

Detailed explanation-1: -The patient is then connected to a dialysis machine, which is also called a hemodialyzer. The blood flows through small channels made of semipermeable membranes (Figure 2). The dissolved substances like urea and salts pass through a sterile solution.

Detailed explanation-2: -Dialysis treatments use selective (semipermeable) membranes that allow small molecules, like urea, to diffuse out of the blood.

Detailed explanation-3: -Excess salts diffuse into the dialysis fluid. The dialysis fluid contains no urea, so all of the urea diffuses from the blood in to the dialysis fluid from the high concentration in the blood to the lower concentration in the dialysis fluid.

Detailed explanation-4: -With hemodialysis one supplements calcium and bicarbonate, while removing potassium, magnesium, and urea and other toxins using diffusion. Water and sodium are removed by ultrafiltration.