| These structures are not considered to be part of the nephron, but are part of the uriniferous tubule. |
| If the spermatozoa showed no motility, a new tubule closer to the testis was selected, and the process was repeated. |
| The primitive germinal cells are the spermatogonia, which lie peripherally in the tubule wall, outside the barrier of Sertoli cell junctions. |
| It consists of an end sac, a straight proximal tubule, a short distal tubule, and a raised nephropore, all in the scape of the chelifore. |
| An efferent cuticular tubule, or duct, leads out of the end of the vesicle towards the center of the secretory lobe. |
| The proximal tubule is the site of most secretion, reabsorption, and active transport. |
