Question

Secondary sex organ is
A. Testis
B. Breast
C. Beard
D. Vas deferens

Answer 1

It is a tiny muscular tube present in the male reproductive system that assists in carrying the sperm from epididymis to the ejaculatory duct. In the male body, there is a pair of these ducts.

Complete answer: A primary sex organ or a reproductive organ is a part of an animal’s body that is involved in the process of sexual reproduction. The reproductive organs constitute the reproductive system of animals. A secondary sex organ is directly not involved in reproduction but helps in reproduction by transferring gametes. Vas deferens is a secondary sex organ that helps in transferring sperms from seminiferous tubules to the penis. During ejaculation in males, sperms are expelled from the seminiferous tubules of the testis that open into vasa efferentia through rete testis. The vasa efferentia leave the testis and open into the epididymis. This leads to vas deferens that receive a duct from the seminal vesicle and open into the urethra as the ejaculatory duct. Sperms are stored in the ejaculatory duct until released through the urethra. During intercourse, sperms are released into the vagina by the process of ejaculation. The journey of sperms starts from the seminiferous tubules and ends with the penis.
Hence, the correct answer is option D.

Note: During ejaculation, the spermatozoa are expelled from the tail of epididymis into the vas deferens duct. Then, the sperms travel through the spermatic cord into the pelvic cavity. The vas deferens join the seminal vesicle and form the ejaculatory duct which empties into the urethra through the prostate duct.