nephron
C1CEFR level
78/100Rarity: rare
TechnicalRegister
The functional unit of the kidney, comprising a glomerulus and its associated tubule.
Each human kidney contains roughly a million nephrons, a reserve that masks early functional decline.
Rarity runs from 0 (a word everyone knows) to 100 (almost never seen outside specialist or literary writing). Level is the word's real difficulty on the CEFR scale, from A1 to C2.
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