Ultrafiltration is the process where the blood is filtered to allow some substances to enter the nephron to get rid of waste products. In exams, they often ask students to explain how it works You will need to illustrate the filters in the walls of the glomerulus and Bowman's capsule and explain how they prevent the loss of blood cells and plasma proteins from the blood while allowing other substances (eg. water, urea) to leave the blood and enter the nephron to become the filtrate.

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