Find the odd one out. Give reasons for your choice:
ureter, kidney, urinary bladder, lung, urethra
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Lung
Reason — Lung is a part of respiratory system while others are parts of excretory system.
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Differentiate between filtration and reabsorption.
Differentiate between secretion and excretion.
skin, heart, lung, liver, kidney
urea, salts, blood, carbon dioxide, bile