ANATOMY

Detailed explanation-1: -Final answer: Medulla of both the kidneys opens into a funnel-shaped cavity called renal pelvis.

Detailed explanation-2: -Urine passes from the renal pyramids into the renal pelvis. This funnel-shaped structure occupies the central cavity of each kidney and then narrows as it extends out to join the ureter. Urine drains from the renal pelvis into the ureter.

Detailed explanation-3: -Urine drains from the ducts in the papilla into a renal calyx. Each calyx is lined by transitional epithelium, or urothelium. The calyces merge into the renal pelvis.

Detailed explanation-4: -The renal pelvis or pelvis of the kidney is the funnel-like dilated part of the ureter in the kidney. It is formed by the covnvergence of the major calyces, acting as a funnel for urine flowing from the major calyces to the ureter.

Detailed explanation-5: -The renal pelvis is a funnel shaped structure present on the medial side of each kidney. It is located within the hilum of the kidney. The renal pelvis receives the urine from the major calyx. It then moves to narrow down to form the ureter.