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Edexcel IGCSE·Biology·IGCSE Biology

Excretion & Homeostasis

13 min read

Excretory organs, the kidney and osmoregulation, and temperature and blood glucose control.

Excretion

Excretion is the removal of metabolic waste: CO₂ (lungs), urea (kidneys, from excess amino acids broken down by the liver) and water/salts.

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