Question

blood enters the kidney through the multiple choice renal pelvis, renal artery, renal vein, renin

Explanation:

• The renal pelvis is part of the urinary collecting system, not for blood entry.
• The renal artery carries oxygen - rich blood into the kidney to supply it with nutrients and for filtration processes.
• The renal vein carries blood away from the kidney (deoxygenated, after filtration).
• Renin is an enzyme, not a blood vessel for blood entry into the kidney.

Answer:

B. renal artery