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Edexcel ·Biology·Cambridge IGCSE Biology

Excretion & Homeostasis

13 min read

The kidneys and excretion, and how the body keeps internal conditions constant including temperature and blood glucose.

Excretion

Excretion is the removal of the waste products of metabolism. Key examples: carbon dioxide (from respiration, removed by the lungs) and urea (made in the liver from excess amino acids — deamination — and removed by the kidneys).

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