Question

If for some reason, the vasa efferentia in the human reproductive system get blocked, the gametes will not be transported from _______.
A. Testes to Epididymis
B. Epididymis to Vas deferens
C. Ovary to Uterus
D. Vagina to Uterus

Answer 1

Hint: The vasa efferentia exits the testis and opens in the posterior surface of each testis into epididymis. The epididymis leads to vas deferens which ascends into the abdomen and loops over the urinary bladder.

Complete Answer:
- Human reproduction activities include the production of gametes i.e. sperm in males and ovum in females, the delivery of sperm to the female genital tract (insemination) and the combination of male and female gametes (fertilisation) leading to the development of zygotes.
- This is accompanied by the initiation and growth of blastocyst and it is binding to the uterine wall (implantation), embryonic development (gestation) and birth of the baby (parturition). There are interesting variations in reproduction activities in males and females, for example, sperm production occurs even in elderly men, but ovum forming ends in women at the age of fifty.
- Rete testis, vasa efferentia, epididymis, and vas deferens comprise the male sex accessory ducts. The seminiferous tubules of the testes open by rete testis into the vasa efferentia. The vasa efferentia exits the testis and opens in the posterior surface of each testis into epididymis.
- The epididymis leads to vas deferens which ascends into the abdomen and loops over the urinary bladder. It collects the seminal vesicle duct and opens as an ejaculatory duct into urethra. These ducts save and hold sperms through a urethra from the testis to the outside. The urethra comes from the urinary bladder and enters its outside opener called the urethral meatus through the penis.

Thus, the correct answer is option A. i.e., Testes to Epididymis.

Note: The male reproductive system is found in the pelvic area. It contains a set of testes along with glands, accessory ducts, and the external genitalia. The female reproductive system is found in the pelvic area comprises a pair of ovaries with a pair of oviducts, uterus, vagina, cervix, and the external genitalia.