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Which of the following organs removes metabolic waste products from the blood?
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25. The Urinary System
Introduction to the Urinary System
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What is formed as wastes and excess water are removed from the blood and excreted by the kidneys?
A
Sweat
B
Bile
C
Lymph
D
Urine
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Understand the function of the kidneys: The kidneys are responsible for filtering blood to remove waste products and excess substances, including water, from the body.
Identify the process of filtration: Blood enters the kidneys through the renal arteries, where it is filtered in the nephrons, the functional units of the kidneys.
Recognize the formation of urine: During filtration, waste products such as urea, creatinine, and excess ions are removed from the blood, along with excess water, forming urine.
Consider the role of urine: Urine is the liquid waste product that is excreted from the body, containing the filtered waste and excess substances.
Differentiate urine from other excretions: Unlike sweat, bile, or lymph, urine is specifically formed in the kidneys as a result of blood filtration and is excreted through the urinary system.
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