Glomerulus is a network of tiny blood vessels (capillaries) located in the kidneys, specifically within the nephrons, which are the functional units of the kidney. It plays a crucial role in the filtration of blood, allowing water, ions, and small molecules to pass into the Bowman’s capsule while retaining larger molecules like proteins and blood cells. This filtration process is essential for the formation of urine and the regulation of fluid balance, electrolytes, and waste removal in the body.