How the kidneys filter wastes from the blood?

Each of your kidneys is made up of about a million filtering units called nephrons.

Each nephron includes a filter,

called the glomerulus, and a tubule. The nephrons work through a two-step process:

the glomerulus filters your blood,

and the tubule returns needed substances to your blood and removes wastes

it forms an anion that has a larger radius. anions have a negative charge and are larger than the original atom.