Which structure of the kidney is responsible for filtering blood to form urine?

• A. Renal pyramid
• B. Renal corpuscle
• C. Renal capsule
• D. Renal pelvis

Answer: (B)

Verified step by step guidance

1. Understand the function of the kidney: The kidney's primary role is to filter blood, remove waste products, and regulate water and electrolyte balance. This process begins with the filtration of blood.
2. Identify the structure responsible for filtration: The renal corpuscle is the structure in the kidney that initiates the filtration process. It consists of two main components: the glomerulus (a network of capillaries) and Bowman's capsule (a surrounding structure that collects the filtrate).
3. Clarify the role of the renal pyramid: The renal pyramid is involved in the transport and concentration of urine, but it does not filter blood. It is part of the medulla and contains collecting ducts.
4. Clarify the role of the renal capsule: The renal capsule is a tough outer layer that protects the kidney but does not participate in blood filtration.
5. Clarify the role of the renal pelvis: The renal pelvis is a funnel-shaped structure that collects urine from the kidney and channels it to the ureter. It is not involved in filtration.