Nephrons are tiny tubules (minute tubes) which make up the tiniest functional unit of the kidney, i.e. they are the smallest level at which the function of the kidney, to remove waste, excess salt and excess water, is carried out. Each nephron begins in the cortex of the kidney, then dips into the medulla of the kidney, before coming back to the cortex, then goes through the medulla into the pelvis. In the pelvis, the nephrons join up with the ureter.
In humans, a normal kidney has between 800,000 and 1.5 million nephrons.
References[change | change source]
- p160, Biology, Mary Jones and Geoff Jones, 2002 edition, Cambridge University Press, ISBN 0-521-45618-5
- Guyton, Arthur C.; Hall, John E. (2006). Textbook of Medical Physiology. Philadelphia: Elsevier Saunders. pp. 310. .