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.
Water hog Water hog A water hog is a machine that removes water from sports grounds. The water hog was invented by Hugh McLaughlin. Driven by a rider, it has a wide, front roller that absorbs the water, transfers it to a storage tank, and allows it to be discharged in a safe location. Some water hogs can suck off excess water at a rate of 200 gallons per minute and throw it as far as 100 feet away from the machine. It is designed so that it will not damage the turf. Originally devised for use on cricket pitches, it is