Kidneys Filter Blood Waste

Steps:

• Dialysis removes waste products and excess salts from blood when the body can't.
• Identify the organ that normally filters blood to eliminate these substances.
• The kidneys perform filtration, reabsorption, and excretion in the nephrons.
• If kidneys fail, dialysis is needed to replace this function.

Why C is correct:

• Kidneys filter blood through nephrons to remove waste and excess salts, maintaining homeostasis as defined in renal physiology.

Why the others are wrong:

• A. Bladder stores urine after filtration, not involved in blood processing.
• B. Heart pumps blood circulation, unrelated to waste removal.
• D. Ureter transports urine from kidneys to bladder, no filtration role.

Final answer: C