The kidney is composed of about 1 million functional units, called nephron
glomerular capsule (Bowman’s capsule) as a network of arterial capillaries
the nephron is about 3 cm long and its parts:
1) the proximal convoluted tubule
2) the descending loop of Henle
3) the ascending loop of Henle
4) the distal convoluted tubule
5) the collecting tubule and duct
