Question

Seminal vesicle is absent in

• A. Boar
• B. Dog
• C. Stallion
• D. Bull

Hint:

Comparative Anatomy of Male Accessory Glands:
- Dog: Only Prostate gland.
- Cat: Prostate and Bulbourethral glands (No seminal vesicles).
- Bull/Stallion/Boar: Prostate, Seminal Vesicles, and Bulbourethral glands.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Male accessory sex glands produce seminal plasma, which provides nutrients, buffering capacity, and volume to semen.
The distribution of these glands varies widely among domestic animal species.

Step 2: Detailed Explanation:
Let us examine the accessory sex glands across different species:
- The Boar, Stallion, and Bull possess a complete set of accessory sex glands.
This includes the vesicular glands (seminal vesicles), prostate gland, and bulbourethral (Cowper's) glands.
- The Dog is anatomically unique among domestic mammals because it lacks seminal vesicles and bulbourethral glands.
The only accessory sex gland present in the dog is a large, well-developed prostate gland.
The prostate completely surrounds the urethra at the neck of the bladder.
Because dogs lack seminal vesicles, their ejaculate has a smaller gel-fraction and volume compared to species like the boar.

Step 3: Final Answer:
Seminal vesicles are completely absent in the Dog.