Question

Which covering of testis is indicative of its abdominal original?
a. Tunica vaginalis
b. Tunica albuginea
c. Tunica vasculosa
d. Tunica daros

Answer 1

Hint:
The testis in the male body is enclosed by three defensive coatings known with a term tunica. These three coats are Tunica vasculosa, Tunica vaginalis, and Tunica albuginea.

Complete answer:
Figure below shows the placement of Tunica vaginalis.

- To confirm the endurance and development of the male reproductive cells called sperms, the pair of testes have been positioned external the intestinal cavity in a pouch termed scrotum, and this is to safeguard the optimum temperature.

- The sack which contains the membranes of serous that protect the testes is known as the tunica vaginalis. The term tunica vaginalis is a derivative from the vaginal procedure of the peritoneum, which is the fetus before the succession of the pair of testes from the abdomen into the scrotum. So, the precise selection is 'Tunica vaginalis'.

Hence, Option (1) is the correct answer.

Additional Information:
> Every testis is said to have 250 compartments which are called testicular lobule. Also, to make the sperms, each lobule comprises one to three extremely looped seminiferous tubules.

> Spermatogenic cells or male germ cells and Sertoli cells are the two types of cells that make the stratified epithelium of seminiferous tubules. The inner layer of the tunica which consists of plenty of blood vessels and connective tissue is known with the term tunica vasculosa.

> The fibrous covering that spreads the extension of the corpora cavernosa penis and corpus spongiosum penis is called as tunica albuginea.

> The thin layer that is non-striped covered with muscular fibres, continuous, around the base scrotum is known as Tunica Dartos.

Note: The muscular sack called scrotum aids in maintaining the low temperature (by around 2-2.5 notches than the temperature of a normal body) which is required for the production of male reproductive cells, sperms. The process of producing the sperms is called spermatogenesis.