MEDICAL PHYSIOLOGY

Detailed explanation-1: -So, the correct answer is ‘Papillary duct of Bellini’.

Detailed explanation-2: -The medulla is divided into 8-18 conical regions, called the renal pyramids; the base of each pyramid starts at the corticomedullary border, and the apex ends in the renal papilla which merges to form the renal pelvis and then on to form the ureter.

Detailed explanation-3: -The renal papillae are the areas where the openings of the collecting ducts enter the kidney and where urine flows into the ureters.

Detailed explanation-4: -The conical shaped medullary regions of kidney are the renal pyramids. Tips of the renal pyramids which open into pelvis are renal papillae.