Make a transverse cut through the testis and examine its internal architecture . Just deep to the visceral tunica vaginalis, which covers the anterolateral surface of the testis, identify the thick fibrous white capsule, called the tunica albuginea, which encircles the testis.
Identify the fibrous bands called septae that radiate from the posterior aspect of the testis, called the mediastinum testis. These septae divide the testis into the lobules. The spermatozoa-forming seminiferous tubules are contained within these lobules.
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