THORAX ABDOMEN AND PELVIS

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

Detailed explanation-2: -The renal pelvis is a large cavity that collects the urine as it is produced. The periphery of the renal pelvis is interrupted by cuplike projections called calyces. A minor calyx surrounds the renal papillae of each pyramid and collects urine from that pyramid. Several minor calyces converge to form a major calyx.

Detailed explanation-3: -The renal pelvis is triangular in shape, lies posteriorly in the renal hilum surrounded by fat and vessels and is formed by either the union of two-to-three major calyces or of seven-to-eleven minor calyces.

Detailed explanation-4: -The area at the center of the kidney. Urine collects here and is funneled into the ureter, the tube that connects the kidney to the bladder.