Which of the following is not a part of intra-testicular duct system?

Options

A. Tubuli recti
B. Proximal part of ductuli efferentes
C. Roto tostis
D. Epididymis

Answer

To solve the question "Which of the following is not a part of the intra-testicular duct system?", we will analyze each of the given options step by step.

### Step 1: Understand the Intra-Testicular Duct System
The intra-testicular duct system consists of various structures within the testis that are involved in the transport of sperm and fluids. These include the seminiferous tubules, rete testis, and ductuli efferentes.

### Step 2: Analyze Each Option
1. **Tubular Recti**:
- Also known as the straight tubules, they connect the seminiferous tubules to the rete testis.
- **Conclusion**: This is a part of the intra-testicular duct system.

2. **Proximal Part of Ductuli Efferents**:
- These structures are responsible for absorbing fluid from the seminiferous tubules.
- They do not function as a duct in the same way that the other structures do.
- **Conclusion**: This is NOT a part of the intra-testicular duct system.

3. **Rete Testis**:
- This is a network of tubules that collects sperm from the seminiferous tubules and connects to the ductuli efferentes.
- **Conclusion**: This is a part of the intra-testicular duct system.

4. **Epididymis**:
- This is a tube that connects the testicle to the vas deferens and is involved in the maturation of sperm.
- **Conclusion**: This is also a part of the intra-testicular duct system.

### Step 3: Identify the Correct Answer
Based on the analysis:
- The **proximal part of ductuli efferents** is the only option that is not considered a part of the intra-testicular duct system.

### Final Answer
The correct answer to the question is **Proximal Part of Ductuli Efferents**.

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