91影视

The male reproductive system is primarily external to the body. The penis, scrotum, and testicles are among these external organs. The vas deferens, prostate, and urethra are internal organs. The male reproductive system is in charge of both sexual and urinary functions.

The seminiferous tubule is present in the male reproductive system, and the cervix is part of the female reproductive system. The seminiferous tubule is the site of spermatogenesis and produces sperm cells. The cervix is the site of fertilization, i.e.,, the sperm and egg fuses in females.

Thus, both organs' function differs, so the pairing between the seminiferous tubule and cervix is not proper.

Therefore, the given option is correct.

The vas deferens are part of the male reproductive system, and the oviduct is the female reproductive organ. The function of the vas deferens is the transfer of mature sperms to the urethra during ejaculation. The function of the oviduct is to carry the ovum to the cervix.

Thus, the vas deferens and oviduct have similar functions in the different reproductive systems, so that this pairing can be proper.

Therefore, the given option is incorrect.

Testosterone is the male reproductive hormone, and estradiol is the female reproductive hormone. The function of testosterone is to maintain the fertility of males, while estradiol maintains the reproductive system in females.

Thus, testosterone and estradiol are both hormones of the respective reproductive system; this pairing is correct.

Therefore, the given option is incorrect.

The scrotum is the organ present on the external part of the male reproductive system, and labia majora is the external part of the female reproductive system. The scrotum is a bag-like structure that protects the testicles in males.

The function of labia majora is to protect the inner and the sensitive regions of the vulva, like the clitoris and labia minora in the females.

Thus, both organs, scrotum and labia majora, are located on the outside of the body in males and females; respectively, they are properly paired.

Therefore, the given option is incorrect.