Which one of the following is not a male accessory gland?

Options

A. Seminal vesicle
B. Ampulla
C. Prostate
D. Bulbourethral gland

Answer

To solve the question "Which one of the following is not a male accessory gland?", we will analyze each option provided:

1. **Seminal Vesicle**:
- The seminal vesicle is an accessory gland in the male reproductive system. It is located between the bladder and rectum and contributes about 85% of the seminal fluid. Therefore, this option is a male accessory gland.

2. **Ampulla**:
- The ampulla is not part of the male reproductive system; it is actually part of the female reproductive system. Specifically, it is a section of the oviduct (fallopian tube) located between the infundibulum and the isthmus, where fertilization typically occurs. Thus, this option is not a male accessory gland and is the correct answer to the question.

3. **Prostate Gland**:
- The prostate gland is a well-known male accessory gland located between the bladder and the penis. It releases a fluid that nourishes and protects sperm. Hence, this option is also a male accessory gland.

4. **Bulbourethral Gland**:
- The bulbourethral gland (also known as Cowper's gland) is another male accessory gland located posterior to the urethral membrane. It contributes to the volume of semen and releases lubricating mucus. Therefore, this option is a male accessory gland as well.

After analyzing all the options, we can conclude that the correct answer is:

**Answer: Ampulla (Option B)**