What is the name of the dense white fibrous capsule that encases each testicle?

The dense white fibrous capsule that encases each testicle is called the tunica albuginea. This structure plays a crucial role in protecting the testicles and maintaining their shape. It is composed of connective tissue that provides structural support and houses blood vessels and nerves that supply the testis. The tunica albuginea also contributes to the organization of the testis by forming septa that divide the internal space into lobules, each containing seminiferous tubules where spermatogenesis occurs. This anatomical feature is essential for the proper function of the testes as it ensures both protection and the structural integrity necessary for the development of sperm.

The other options do not describe the fibrous capsule of the testis. The epithelium refers to a type of tissue lining organs, the serosa is a membrane that covers organs within body cavities, and the peritoneal lining pertains to the serous membrane that lines the abdominal cavity. Therefore, these terms do not relate to the specific protective structure found around each testicle.