In the kidney the structures that filter the blood are the?

In the kidney, the structures that filter the blood are the nephrons, specifically the glomeruli within them. Each nephron consists of a glomerulus, where blood filtration occurs, and a renal tubule, where the filtered substances are processed into urine. The glomerulus allows water, ions, and small molecules to pass through while retaining larger molecules like proteins and blood cells. This filtration process is essential for maintaining fluid and electrolyte balance in the body.