The tunica albuginea is the dense fibrous capsule that directly surrounds the testicular parenchyma. The tunica vaginalis is a serous covering surrounding the testis externally, and the dartos fascia and pampiniform plexus are part of the scrotal wall and spermatic cord, respectively.

According to Rumack’s Diagnostic Ultrasound:

“The tunica albuginea is the fibrous capsule surrounding the testis and forming septa within the gland.”