Which of the following accessory gland is not paired?

Options

A. Seminal vesicle
B. Prostate gland
C. Bulbourethral gland
D. None of these

Answer

To determine which accessory gland is not paired among the given options, we will analyze each option one by one.

### Step 1: Analyze the Seminal Vesicles
- The seminal vesicles are a pair of glands located behind the urinary bladder in males.
- They are responsible for producing a significant portion of the fluid that makes up semen.
- Since there are two seminal vesicles (one on each side), they are considered a paired structure.

**Hint:** Remember that paired structures mean there are two of them, one on each side.

### Step 2: Analyze the Prostate Gland
- The prostate gland is located underneath the bladder.
- It is roughly the size of a chestnut and is a single structure.
- The prostate gland plays a crucial role in the male reproductive system, contributing to the composition of semen.
- Since there is only one prostate gland, it is not paired.

**Hint:** Look for structures that are singular in the male reproductive system.

### Step 3: Analyze the Bulbourethral Glands
- The bulbourethral glands, also known as Cowper's glands, are located laterally and posterior to the membranous part of the urethra.
- These glands are responsible for producing a pre-ejaculatory fluid.
- There are two bulbourethral glands, one on each side of the urethra, making them a paired structure.

**Hint:** Again, check if the structure exists in pairs or as a single entity.

### Conclusion
After analyzing all the options:
- Seminal vesicles: Paired
- Prostate gland: Not paired (single)
- Bulbourethral glands: Paired

Thus, the accessory gland that is not paired is the **Prostate Gland**.

**Final Answer:** Prostate gland is the accessory gland that is not paired.