Final answer:
Bowman's capsule surrounds each glomerulus; it is part of the nephron within the renal corpuscle and functions in initiating urine formation by filtering the blood.
Step-by-step explanation:
The structure that surrounds each glomerulus is called Bowman's capsule. The Bowman's capsule is a crucial part of the kidney's filtering unit, the nephron, and it works in conjunction with the glomerulus to filter the blood, starting the process of urine formation. In the renal corpuscle, the renal tubule begins with the Bowman's capsule and then extends to the proximal convoluted tubule, the loop of Henle, and eventually the distal convoluted tubule.