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Structure of the Kidney

AQA A-level BiologyHomeostasisLesson 19 of 33

The kidneys are covered by a thin, tough membranous capsule made of tough fibres of collagen and elastin. There are three main areas. The outer cortex which has a dense network of capillaries, the medulla which contains parts of the filtering and collecting units - nephrons - and the pelvis where urine collects before passing into the ureter.

Diagram

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Key terms in this lesson

nephron
The functional filtering unit of the kidney, consisting of the Bowman's capsule, proximal convoluted tubule, loop of Henle, distal convoluted tubule and collecting duct.

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