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This is a model of the human excretory (renal) system. Each funnel is packed with gravel above cotton wool. Muddy water is poured into each funnel and clear water collects in the beaker below. What does the model show well, and what does a real kidney do that the model cannot?
Describe one strength of the funnel model of the renal system, and one limitation of it.
[2 marks]
Guided Hint
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Worked solution
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