In human male testes , the regions outside the seminiferous tubules are called interstitial spaces, and they contain

Options

A. Immunologically competent cells
B. Leydig cells
C. Sertoli cells
D. Both (A) & (B)

Answer

To solve the question regarding what is contained in the interstitial spaces of the human male testes, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Testicular Structure**:
- The male testes are composed of numerous compartments known as testicular lobules. Each lobule contains 1 to 3 seminiferous tubules where sperm production occurs.

2. **Identifying the Components of Seminiferous Tubules**:
- Inside the seminiferous tubules, there are two main types of cells:
- **Sertoli Cells**: These cells provide nourishment and support to the developing sperm cells (male germ cells).
- **Male Germ Cells**: These are responsible for the formation of sperm through the process of meiosis.

3. **Defining Interstitial Spaces**:
- The regions outside the seminiferous tubules are referred to as interstitial spaces.

4. **Identifying the Cells in Interstitial Spaces**:
- The interstitial spaces contain specific types of cells known as **Leydig Cells** (or interstitial cells).

5. **Function of Leydig Cells**:
- Leydig cells are crucial as they produce and secrete male hormones, particularly testosterone. Testosterone plays a vital role in:
- The process of spermatogenesis (formation of sperm).
- The development of secondary sexual characteristics during puberty.

6. **Conclusion**:
- Therefore, the correct answer to the question is that the interstitial spaces in the human male testes contain **Leydig Cells**.

### Final Answer:
The interstitial spaces in human male testes contain **Leydig Cells**.

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