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. **Understand the Question**: The question asks for the specific structure that facilitates the release of sperm into the lumen of the seminiferous tubules.

2. **Evaluate the Options**:
- **Option A: Sertoli cells**: These cells are located within the seminiferous tubules and play a crucial role in supporting and nourishing developing sperm cells. They are also involved in the process of spermiation, which is the release of mature sperm cells (spermatids) into the lumen of the seminiferous tubules.

- **Option B: Spermatogonia**: These are the precursor cells that undergo division to eventually form sperm cells. However, they do not release sperm; they are the starting point in the process of spermatogenesis.

- **Option C: Leydig cells**: Also known as interstitial cells, Leydig cells are located between the seminiferous tubules and are primarily responsible for producing male sex hormones, such as testosterone. They do not participate in the release of sperm.

- **Option D: Oogonial cells**: These cells are related to female gametogenesis and are not involved in sperm production or release. They can be eliminated as they pertain to the female reproductive system.

3. **Conclusion**: Based on the analysis, the structure responsible for the release of sperm in the lumen of seminiferous tubules is the **Sertoli cells**.

### Final Answer:
The correct answer is **Sertoli cells**.

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