Multiple Choice
In the kidney, the renal papillae drain directly into which structure?
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25. The Urinary System
The Kidneys
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Which structure of the kidney directly drains urine into the ureter?
A
Renal cortex
B
Glomerulus
C
Renal pyramids
D
Renal pelvis
Verified step by step guidance1
Step 1: Understand the anatomy of the kidney and the flow of urine. Urine is formed in the nephrons, which are located primarily in the renal cortex and renal medulla (including the renal pyramids).
Step 2: Recognize that urine from the nephrons collects into small ducts within the renal pyramids, which then drain into larger structures called the minor calyces.
Step 3: The minor calyces merge to form major calyces, which then converge into a funnel-shaped structure called the renal pelvis.
Step 4: The renal pelvis acts as a central collecting area that directly drains urine into the ureter, which carries urine to the bladder.
Step 5: Therefore, the structure of the kidney that directly drains urine into the ureter is the renal pelvis.
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