Collecting pa of kidney develops from
**Core Concept**
The development of the kidney involves the formation of the nephrons and the collecting system. The **collecting ducts** are part of the collecting system, which plays a crucial role in urine formation. The embryological origin of the collecting system is distinct from that of the nephrons.
**Why the Correct Answer is Right**
The collecting system of the kidney, including the **collecting ducts**, **calyces**, and **renal pelvis**, develops from the **ureteric bud**, which is an outgrowth of the **mesonephric duct**. This process is critical for the proper formation and function of the kidney. The ureteric bud undergoes branching to form the collecting system.
**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because it does not specify the correct embryological origin.
**Option B:** Incorrect as it is not related to the development of the collecting system.
**Option C:** Incorrect because, although related to kidney development, it is not specific to the collecting system.
**Option D:** Incorrect as it is not the correct term for the development of the collecting system.
**Clinical Pearl / High-Yield Fact**
The development of the kidney is a complex process, and abnormalities in this process can lead to congenital anomalies of the kidney and urinary tract. Understanding the embryological origin of the collecting system is crucial for diagnosing and managing these conditions.
**Correct Answer:** D. Ureteric bud.