The glomerulus and its surrounding Bowman's capsule constitute a renal corpuscle, the basic filtration unit of the kidney. The rate at which blood is filtered through all of the glomeruli, and thus the measure of the overall renal function, is the glomerular filtration rate (GFR).
The Renal Corpuscle. Together, theglomerulus and its surrounding Bowman's capsule are called a renal corpuscle. This structure is located in the renal cortex. You should also be aware that the nephron is composed of two main parts: the renal tubule and the renal corpuscle.