Renal Replacement Therapy (RRT) Overview. Overview of RRT. Renal replacement therapy (RRT) is required when the kidneys are functioning at less than 10â15 percent. Dialysis. People with advanced chronic renal failure (CRF), kidney failure, who have progressed to end-stage renal disease (ESRD) usually require dialysis.
Rod cells are far more numerous than cone cell. Cones cells are far fewer than rod cells. Usually located around the periphery of retina. Usually located in the centre of retina. All rod cells are alike, and do not give colour vision. Cones are of three types: blue, green and red, and give colour vision.
Pine cones are the reproductive organs of pine trees. The cones are either male or female. Most pine tree species have both sexes of cones on each tree. The male cones produce pollen and the female cones produce ovules.The pollen and ovules must come into contact to fertilize and produce the next generation of pine trees.he cones are either male or female. Most pine tree species have both sexes of cones on each tree. The male cones produce pollen and the female cones produce ovules.