In the urinary system, which organ primarily removes metabolic wastes from the blood by filtering it to form urine?
A
Gallbladder
B
Kidneys
C
Liver
D
Spleen
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1
Step 1: Understand the role of the urinary system, which is primarily responsible for removing metabolic wastes and excess substances from the blood to maintain homeostasis.
Step 2: Identify the organs listed in the problem: Gallbladder, Kidneys, Liver, and Spleen, and recall their primary functions in the body.
Step 3: Recognize that the gallbladder stores bile, the liver processes nutrients and detoxifies chemicals, and the spleen filters blood but mainly for immune functions and recycling red blood cells.
Step 4: Recall that the kidneys are the organs that filter blood to remove metabolic wastes, excess ions, and water, forming urine in the process.
Step 5: Conclude that the kidneys are the primary organs in the urinary system responsible for filtering blood and producing urine.