The region outside the seminiferous tubules is called interstitial spaces which contain all , except

Options

A. Blood vessels
B. Immunologically competent cells
C. Leyding cell
D. Sertoli cells

Answer

To solve the question regarding the components found in the interstitial spaces outside the seminiferous tubules, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks what is NOT found in the interstitial spaces outside the seminiferous tubules.

2. **Identify the Components of Interstitial Spaces**:
- The interstitial spaces contain various components that play roles in the reproductive system.
- These include blood vessels, immunological cells, and Leydig cells.

3. **Evaluate Each Option**:
- **Option 1: Blood Vessels**: Blood vessels are indeed present in the interstitial spaces. They are crucial for supplying nutrients and oxygen to the tissues. Thus, this option is incorrect as it is present.

- **Option 2: Immunological Cells**: Immunologically competent cells are also found in the interstitial spaces. They are important for local immune responses. Therefore, this option is also incorrect as it is present.

- **Option 3: Leydig Cells**: Leydig cells are located in the interstitial spaces and are responsible for producing testosterone. This option is incorrect as it is present.

- **Option 4: Sertoli Cells**: Sertoli cells are found within the seminiferous tubules and are not located in the interstitial spaces. This option is correct as it is NOT present in the interstitial spaces.

4. **Conclusion**: Based on the evaluation of each option, the correct answer is **Option 4: Sertoli Cells**, as they are not found in the interstitial spaces.

### Final Answer:
The region outside the seminiferous tubules, known as interstitial spaces, contains all of the following except **Sertoli Cells**.

---