Dialysis blocks the passage of larger substances (for example, red blood cells, large proteins). This replicates the filtering process that takes place in the kidneys when the blood enters the kidneys and the larger substances are separated from the smaller ones in the glomerulus. The two main types of dialysis, hemodialysis and peritoneal dialysis, remove wastes and excess water from the blood in different ways. Hemodialysis removes wastes and water by circulating blood outside the body through an external filter, called a dialyzer, that contains a semipermeable membrane. The blood flows in one direction and the dialysate flows in the opposite.
Ties of Blood and Water Ties of Blood and Water "Ties of Blood and Water" is an episode of the syndicated American science fiction television series "", the nineteenth episode of the . Set in the 24th century, the series follows the adventures on "Deep Space Nine", a space station located near a stable wormhole between the Alpha and Gamma quadrants of the Milky Way Galaxy. In this episode, Major Kira (Nana Visitor) must deal with her feelings over the impending death of her friend Tekeny Ghemor (Lawrence Pressman) as she takes notes from him as he reveals secrets about the Cardassian Union and the