Diagram of an adult human testicle A) Blood vessels M B B )Head of epididymus C ) Efferent ductile D)Seminiferous tubules D E Parietal lamina of tunica vaginalis F)Visceral lamina of tunica vaginalis H G ) Cavity of tunica vaginalis H. Tunica albuginea K 1 ) Lobule of testis; J. )Tail of epididymus L) Mediastinum J M)Vas deferensDiagram of an adult human testicle: A.) Blood vessels; B ) H d f idid B.) Hea d o f epididymus; C.) Efferent ductiles; D.) ; Seminiferous tubules; E.) Parietal lamina of tunica vaginalis; F.) Visceral lamina of tunica vaginalis; G.) Cavity of tunica vaginalis; H.) Tunica albuginea; I ) L b l f t ti I.) L o b ule o f testis; J.) Tail of epididymus; K.) y py ; Bod y of e pidid ymus; L.) Mediastinum; M.) Vas deferens