The Anatomy of the Kidneys. ... Within each nephron, there is a microscopic filtration unit consisting of an exterior capsule—Bowman's capsule—and a network of tiny capillaries called glomerulus.

The fluid which comes out of these capillaries is filtered by Bowman's Capsule. The renal tubules do further processing to make 1.5 litres of urine out of 180 litres of filtered fluid in 24 hours.

Bowman’s capsule rupture may be an important marker of pathologic changes and high risk for end-stage kidney disease (ESKD) in patients with lupus nephritis (LN), according to investigators.