Multiple Choice
Which structure in the internal anatomy of the kidney is primarily responsible for filtering blood to form urine?
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25. The Urinary System
Introduction to the Urinary System
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Which blood vessel carries blood away from the kidneys in the urinary system?
A
Inferior vena cava
B
Aorta
C
Renal artery
D
Renal vein
Verified step by step guidance1
Understand the role of the kidneys in the urinary system: The kidneys filter blood to remove waste products and excess substances, producing urine. After filtration, the cleaned blood needs to return to the circulatory system.
Identify the blood vessels associated with the kidneys: The renal artery brings blood to the kidneys for filtration, while the renal vein carries filtered blood away from the kidneys.
Clarify the direction of blood flow: Blood flows into the kidneys through the renal artery and exits the kidneys through the renal vein. The renal vein connects to the inferior vena cava, which transports blood back to the heart.
Eliminate incorrect options: The inferior vena cava carries blood to the heart, not directly away from the kidneys. The aorta is responsible for distributing oxygenated blood from the heart to various parts of the body, including the renal artery, but does not carry blood away from the kidneys.
Conclude that the renal vein is the correct answer because it specifically carries filtered blood away from the kidneys to the circulatory system.
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