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Which tissues divide each testis into lobules?

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Front view anatomical diagrams of the male and female reproductive systems, with labeled organs including penis, testis, prostate gland, uterus, ovary, and vagina. — human reproductive system Organs and structures of the male and female reproductive systems.

Each testis is enclosed in a fibrous sac known as the tunica albuginea. This sac features extensions that act as partial partitions, dividing the interior of the testis into approximately 250 compartments called lobules. In many mammals, these lobules are further separated by connective-tissue septa, or walls, which allow for the efficient packing of seminiferous tubules within the limited space of the testis.12