Sustentacular Cell Spermatogonia Spermatocytes Basement Membrane Spermatids Sperm Cells Interstitial Cell Acrosome Nucleus Centriole Mitochondria Tail Seminiferous Tubule Testis Tubulus Rectus Rete Testis Efferent Ductules Epididiymus Ductus Deferens Tunica Albuginea Lobules Septa Head Midpiece Tail