What part of the renal corpuscle in the kidney picks up substances filtered from the blood?

The renal corpuscle is the initial filtering component of the nephron in the kidney, which plays a crucial role in the formation of urine. It consists of two main structures: the glomerulus and Bowman's capsule.

Bowman's capsule, a cup-like structure that surrounds the glomerulus, is responsible for collecting the filtrate that is produced when blood is filtered. As blood flows through the glomerulus, water, salts, and small molecules pass through the capillary walls into Bowman's capsule, where they are collected and eventually processed into urine.

This function of Bowman's capsule is vital because it initiates the process of urine formation by capturing the substances filtered from the blood, which include not just waste products but also metabolites and electrolytes. Therefore, Bowman's capsule is the correct answer for identifying which part of the renal corpuscle collects the filtered substances.

In contrast, the renal tubule further processes the filtrate collected in Bowman's capsule, the glomerulus is the site of filtration itself, and the collecting duct is involved in the final concentration and transport of urine. Each of these structures plays an important role in renal physiology, but the specific function of collecting the initial filtrate is attributed to Bowman's capsule.