② Lobule a. seminiferous tubule /highly coiled 30-70cm long . 150-250 mm in D /begin as free blind end run to posterior - become into straight tubule(tubules rectus → enter mediastinum testis→rete testis→ efferent duct→ connect with epididymal duct b. testicular interstitial tissue lct between seminiferous tubule② Lobule a. seminiferous tubule: /highly coiled /30-70cm long, 150-250 mm in D /begin as free blind end →run to posterior →become into straight tubule(tubules rectus) →enter mediastinum testis→rete testis→efferent duct→connect with epididymal duct b. testicular interstitial tissue: LCT between seminiferous tubule