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Which structure in the kidney is primarily responsible for filtering blood?

Glomerulus

Renal pelvis

Nephron

The structure primarily responsible for filtering blood in the kidney is the glomerulus. The glomerulus is a network of capillaries located at the beginning of the nephron, which is the functional unit of the kidney. It plays a crucial role in the filtration of blood, where water, ions, and small molecules are separated from the blood plasma, forming what is known as the glomerular filtrate. This process is a key step in urine formation.

While the nephron is the overall functional unit that includes both the glomerulus and other components responsible for further processing the filtrate, the initial filtration specifically occurs at the glomerulus. The renal pelvis acts as a funnel for urine flowing from the nephron to the ureter, and the ureter is responsible for transporting urine from the kidneys to the bladder. Therefore, the correct answer focuses on the glomerulus as the specific site of blood filtration.

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Ureter

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