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.
Â· Though both firs and pines are conifers, there are differences between the two varieties of conifers that are easy to detect. Â· The one major difference between firs and pines pertains to needles in their cones. While needles are in groups of 2-6 in case of pines, needles are single in case of firs. Â· Cones of firs are bluish green, while those of pine are brown and black. Â· Fir trees are pointed as they grow upwards.