Which of the following cannot be considered as accessory sex duct in male reproductive system ?

Options

A. Seminiferous tubule
B. Vas deference
C. Epididymis
D. Rete tesis

Answer

To solve the question regarding which part cannot be considered an accessory sex duct in the male reproductive system, we will analyze the options provided.

### Step-by-Step Solution:

1. **Understand the Concept of Accessory Sex Ducts**:
- Accessory sex ducts are structures in the male reproductive system that transport sperm and seminal fluid. They include the epididymis, vas deferens, and ejaculatory duct.

2. **Evaluate the Options**:
- **Option A: Seminiferous Tubule**:
- The seminiferous tubules are located within the testes and are responsible for the production of sperm. They do not transport sperm or seminal fluid; instead, they are involved in spermatogenesis.
- **Option B: Vas Deferens**:
- The vas deferens is a muscular tube that transports sperm from the epididymis to the ejaculatory duct. It is considered an accessory sex duct.
- **Option C: Epididymis**:
- The epididymis is a coiled tube where sperm mature and are stored. It also functions as an accessory sex duct.
- **Option D: Retritestis**:
- The retritestis is not a commonly recognized term in the context of male reproductive anatomy. However, if it refers to structures associated with the testes, it may be considered part of the reproductive system but not specifically an accessory duct.

3. **Conclusion**:
- Among the options, the **seminiferous tubule** (Option A) does not function as an accessory sex duct because it is primarily involved in sperm production rather than transportation or secretion of fluids. Therefore, the correct answer is **A. Seminiferous Tubule**.