The fibrous sheath enclosing each testis is called what?

• A. Tunica Albuginea
• B. Tunica Vaginalis
• C. Cremasteric Fascia
• D. Dartos Muscle

Answer: (A)

The fibrous capsule around each testis is the tunica albuginea. This dense connective tissue forms a tough protective envelope directly around the testis and gives it a firm shape. It also sends inward extensions, called septa, that divide the testicular tissue into lobules, which helps organize the production sites for sperm.

Nearby, the tunica vaginalis is a serous membrane that lies outside the tunica albuginea, lining the scrotal sac and creating a potential space—it's not the fibrous capsule itself. The cremasteric fascia and the dartos muscle belong to other layers involved in the spermatic cord and scrotal wall, respectively, and do not encase the testis as a fibrous capsule.