All questions of Reproduction in Humans for Class 8 Exam

The Role of Semen in Reproduction
Semen plays a crucial role in the process of reproduction. Understanding its functions helps highlight its significance in fertilization.
Nourishment and Transportation of Sperm
- Semen is primarily composed of sperm and seminal fluid.
- The seminal fluid provides a nutrient-rich environment, essential for the survival and energy of sperm.
- It contains sugars, proteins, and other substances that nourish sperm cells.
- The fluid also helps transport sperm through the male reproductive tract and into the female reproductive system during ejaculation.
Protection of Sperm
- While the primary role is nourishment, seminal fluid also offers some protection to sperm.
- It creates a more favorable pH environment, which is less acidic than the female reproductive tract, ensuring sperm viability.
- This protective function, however, is secondary to its primary role in nourishment and transport.
Oxygen Supply and Ovulation
- Semen does not directly supply oxygen to sperm; rather, sperm cells utilize energy from the nutrients in the seminal fluid.
- Additionally, semen does not play a role in stimulating ovulation; this is regulated by hormonal changes in the female body.
Conclusion
In summary, the correct answer is option 'A' because the primary role of semen in reproduction is to nourish and transport sperm, ensuring they reach the egg for fertilization effectively. Understanding this function is essential in grasping the basics of human reproduction.