Question

multiple - choice question
which structure secretes urine into sac like tubules?
renal cortex
renal medulla
renal pelvis

Explanation:

The renal medulla contains structures like the loop of Henle and collecting ducts. The collecting ducts are sac - like tubules that collect urine (formed through the processes of filtration, reabsorption, and secretion in the nephrons). The renal cortex mainly has the glomeruli (for filtration) and convoluted tubules (for reabsorption and secretion). The renal pelvis is a funnel - shaped structure that collects urine from the major calyces (which in turn collect from the collecting ducts) and transports it to the ureter.

Answer:

Renal Medulla