Which one of the following is not a part of renal pyramid?

Options

A. Collecting ducts
B. Loop of Henle
C. Convoluted tubules
D. Peritubular capillaries

Answer

To determine which option is not a part of the renal pyramid, we can analyze each of the given options in the context of renal anatomy.

### Step-by-Step Solution:

1. **Understanding the Renal Pyramid**:
- The renal pyramids are conical structures located in the medulla of the kidney. They are responsible for the collection of urine and are involved in the process of filtration and reabsorption.

2. **Identifying the Components**:
- **Collecting Duct**: This is a part of the renal pyramid. It collects urine from the nephrons and channels it into the renal pelvis.
- **Loop of Henle**: This structure is also part of the nephron and is located within the renal pyramid. It plays a crucial role in concentrating urine.
- **Convoluted Tubules**: These are part of the nephron but are located in the renal cortex, not the medulla. Therefore, they are not part of the renal pyramid.
- **Peritubular Capillaries**: These capillaries surround the nephron and are involved in the exchange of substances but are not specifically part of the renal pyramid structure.

3. **Conclusion**:
- Among the options provided, the **Convoluted Tubules** are not part of the renal pyramid. They are located in the renal cortex, while the renal pyramids are located in the medulla.

Thus, the correct answer is **Convoluted Tubules (Option C)**.