1. The distal convoluted tubules of many nephrons open into a straight tube called collecting duct, many of which converge and open into the renal pelvis through renal columns. 2. The Malpighian corpuscle, proximal convoluted tubule and distal convoluted tubule of the nephron are situated in the cortical region of the kidney whereas the loop of Henle dips into the medulla. Regarding 1 and 2 :
