Seminal plasma is constituted by the secretions of which gland?

Options

A. Cowper's gland, prostate gland, Bartholin's gland
B. Seminal vesicle, Prostate gland, Bartholin's gland
C. Prostate gland, Seminal gland, Bulbourethral gland
D. Seminal vesicle and thyroid gland

Answer

**Step-by-Step Solution:**

1. **Understanding Seminal Plasma**: Seminal plasma is the fluid part of semen, which contains sperm and various secretions from male reproductive glands.

2. **Identifying the Glands Involved**: The main glands that contribute to seminal plasma are:
- Seminal vesicles
- Prostate gland
- Bulbo-urethral (Corpus) gland

3. **Contribution of Each Gland**:
- **Seminal Vesicles**: These glands contribute approximately 70% of the seminal plasma. They secrete a fluid that nourishes the sperm and helps in its mobility.
- **Prostate Gland**: This gland contributes about 20-25% of the seminal plasma. Its secretions help to enhance sperm motility and provide a suitable environment for sperm.
- **Bulbo-Urethral (Corpus) Gland**: This gland contributes a small percentage (1-3%) of the seminal plasma. Its primary function is to provide lubrication before copulation.

4. **Eliminating Incorrect Options**:
- The Bartholins gland is a female gland and does not contribute to seminal plasma.
- The thyroid gland is not involved in the production of seminal plasma.

5. **Final Conclusion**: The seminal plasma is primarily constituted by the secretions of the seminal vesicles and the prostate gland, along with a minor contribution from the bulbo-urethral gland.

**Answer**: Seminal plasma is constituted by the secretions of the seminal vesicles and the prostate gland.

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