Urethral meatus refers to the

Options

A. urinogential duct
B. opening of vas deferens into urethra
C. external opening of the uriogenital duct.
D. muscles surrounding the urinogenial duct.

Explanation

**Step-by-Step Text Solution:**

1. **Understanding the Term "Urethral Meatus":**
- The term "meatus" refers to a natural body opening or canal. Therefore, "urethral meatus" specifically refers to the opening associated with the urethra.

2. **Identifying the Function of the Urethral Meatus:**
- The urethral meatus is the external opening of the urethra, which is the duct through which urine and, in males, semen are expelled from the body.

3. **Differentiating Between Male and Female Urethral Meatus:**
- In males, the urethral meatus serves a dual purpose, allowing both urine and semen to exit the body. In females, it is solely for the expulsion of urine.

4. **Analyzing the Options Provided:**
- The options given in the question are:
1. Urogenital duct
2. Opening of vas deferens into urethra
3. External opening of the urogenital duct
4. Muscles surrounding the urogenital duct
- Among these, the correct description of the urethral meatus is the "external opening of the urogenital duct."

5. **Conclusion:**
- Therefore, the correct answer to the question "Urethral meatus refers to the" is option 3: the external opening of the urogenital duct.

---