Which of the following cells of human testis are present in the regions outside the seminiferous tubules but in the testicular lobules ?

Options

A. Leydig cells
B. Sertoli cells
C. Nurse cells
D. All of the above

Answer

To solve the question, we need to identify which cells are located outside the seminiferous tubules but within the testicular lobules in human testes.

### Step-by-Step Solution:

1. **Understand the Structure of Testes**: The human testes are divided into lobules, each containing seminiferous tubules where spermatogenesis occurs. Between these tubules, there are interstitial spaces.

2. **Identify the Types of Cells**: The question provides four options:
- Leydig cells
- Sertoli cells
- Nerve cells
- All of the above

3. **Location of Leydig Cells**: Leydig cells, also known as interstitial cells, are located in the interstitial spaces outside the seminiferous tubules. They are responsible for producing testosterone and other androgens.

4. **Location of Sertoli Cells**: Sertoli cells (or nurse cells) are found within the seminiferous tubules. They support and nourish the developing sperm cells but are not located outside the tubules.

5. **Location of Nerve Cells**: Nerve cells are not specifically associated with the testicular structure in terms of being present in the lobules or seminiferous tubules. They are part of the nervous system and do not play a direct role in the function of the testes.

6. **Evaluate the Options**:
- Leydig cells are present outside the seminiferous tubules.
- Sertoli cells are present inside the seminiferous tubules.
- Nerve cells are not specifically located in the testicular lobules.
- Therefore, "All of the above" is incorrect.

7. **Conclusion**: The only correct answer is Leydig cells, as they are the cells that are present in the regions outside the seminiferous tubules but within the testicular lobules.

### Final Answer:
The correct option is **Leydig cells**.