Question

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

Answer 1

Hint: The sperms follow a pathway to reach the urethra, starting from the seminiferous tubules where they are actually produced.

Complete answer: Vasa efferentia are ducted arising from the seminiferous tubules located within the testis.
1. Sperms are formed in these tubules.
2. The vasa efferentia is a very thin duct lined with cilia to aid the movement of sperms.
3. The vasa efferentia open into a structure called the epididymis.
4. This epididymis is a coil of long and narrow closely connected tubule found on the internal side of the testis.
5. The epididymis is meant for the storage of the sperms.
6. So, in case the vasa efferentia are blocked, naturally, the sperms cannot be passed on from the testes into the epididymis.

Therefore, the correct answer is option B. Testes to the epididymis.

Note: There are almost 15-20 efferent tubules and they are very well convoluted. Vasa efferentia essentially links the testis and epididymis.