Which of the following structures is responsible for the release of sperm in the lumen of seminiferous tubules ?

Options

A. Sertoli cells
B. Spermatogonia
C. Leydig cell
D. Oogonial cells

Answer

To solve the question "Which of the following structures is responsible for the release of sperm in the lumen of seminiferous tubules?", we will analyze each option provided.

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the structure responsible for the release of sperm into the lumen of the seminiferous tubules. The seminiferous tubules are located within the testes and are the site of sperm production.

2. **Evaluating Option 1: Sertoli Cells**:
- Sertoli cells, also known as nurse cells, play a crucial role in supporting and nourishing the developing sperm cells (spermatogenesis).
- They provide structural support and are involved in the release of sperm into the lumen of the seminiferous tubules.
- **Conclusion**: Sertoli cells are indeed responsible for the release of sperm.

3. **Evaluating Option 2: Spermatogonia**:
- Spermatogonia are the undifferentiated male germ cells that undergo mitosis and differentiation to eventually form sperm.
- They do not release sperm; rather, they are the precursor cells in the process of spermatogenesis.
- **Conclusion**: This option is incorrect.

4. **Evaluating Option 3: Leydig Cells**:
- Leydig cells are located in the interstitial space of the testes and are responsible for the production of testosterone.
- They do not play a direct role in the release of sperm into the seminiferous tubules.
- **Conclusion**: This option is incorrect.

5. **Evaluating Option 4: Oogonial Cells**:
- Oogonial cells are female germ cells found in the ovaries and are not related to sperm production or release.
- They are involved in oogenesis, the formation of ova (egg cells).
- **Conclusion**: This option is incorrect.

6. **Final Answer**: Based on the evaluations, the correct answer is **Option 1: Sertoli Cells**.