The vacuoles probably result from extraction of the lipids stored as precursors for testosterone. Also present are the blood vessels which can be readily recognized by the presence of red blood cells. Distinguish between the single layer of myoid cells and the lymphatic endothelial cells. The smaller oval structure on your slide is the epididymis containing profiles of ductus epididymis. Identify the pseudo-stratified columnar epithelium within stereocilia that line the epididymis and note the prominent negative Golgi present in the taller cells.
Most tubules show spermatozoa present in their lumen.
The tall columnar cells have cilia and associated basal bodies, unlike the stereocilia of the epididymis. This section of the testis was cut through the mediastinum testis. Locate the seminiferous tubules and the rete testis. The tubuli recti can be identified by locating the termination of the seminiferous epithelium. The continuation of the tubule is a short segment lined solely by Sertoli cells.