Kidney Capsule: Understanding its Role in Filtration

Capsule

The partially permeable membrane of the kidney is the capsule. The capsule, also known as Bowman's capsule, surrounds the glomerulus, which is a network of capillaries where blood is filtered. The capsule allows certain substances to pass through, such as water, ions, and small molecules, while preventing larger molecules, such as proteins, from passing through. This process of filtration helps to form urine.