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

Options

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

Answer

**Step-by-Step Solution:**

1. **Understand the Structure of the Kidney**: The kidney is divided into two main regions: the outer cortex and the inner medulla. The medulla contains structures known as renal pyramids.

2. **Identify the Components of the Renal Pyramid**: The renal pyramids are conical structures found in the medulla. They consist of various components, including the collecting ducts and the loop of Henle.

3. **Analyze the Given Options**: The options provided are:
- Peritubular capillaries
- Convoluted tubules
- Collecting duct
- Loop of Henle

4. **Determine the Location of Each Component**:
- **Peritubular capillaries**: These are associated with the nephron and are located around the renal tubules, primarily in the cortex.
- **Convoluted tubules**: These are part of the nephron and are located in the cortex.
- **Collecting duct**: This is found in the medulla and is part of the renal pyramid.
- **Loop of Henle**: This structure extends into the medulla and is also part of the renal pyramid.

5. **Identify Which is Not Part of the Renal Pyramid**: Since the convoluted tubules are located in the cortex and not in the medulla, they are not part of the renal pyramid.

6. **Conclusion**: The component that is not a part of the renal pyramid is the **convoluted tubules**.

**Final Answer**: Convoluted tubules

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