Click image to view individual frames

With the coverings of the spermatic cord freed from the testis, identify the coverings of the testis, which are derived from the abdominal peritoneum (Figure 36.5A , Figure 36.5B). The anterolateral surface of each testis is covered by a serous membrane, the tunica vaginalis, which forms a closed sac. Open this sac by making a vertical incision along the anterior surface of the parietal (outer) layer of the tunica vaginalis . Identify the cavity of the tunica vaginalis. The anterolateral aspect of the testis is covered by the visceral (inner) layer of the tunica vaginalis .

Links and References:
Grant's: 2.19, 2.17
Netter (1ed.): 365 (2ed.): 361
Rohen/Yokochi: 321