Key term for OCR GCSE Biology A, used in Homeostasis.
A waste product formed from the breakdown of excess amino acids, which is not reabsorbed by the kidneys and is excreted in urine.
Urea appears in OCR GCSE Biology A revision content for Organism level systems, especially Homeostasis and Function of kidneys.
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Scaling up
The challenges of size • Red blood cells and plasma
