PCT or Proximal Convoluted Tubule is an essential part of Nephron. PCT can be described as a system that helps in the absorption and the reabsorption as well as secretion from within the kidneys . The PCT is an important part of the renal tubule where the reabsorption of essential substances takes place. The blood which is brought by the renal artery is filtered by the glomerulus and then passed onto the PCT.