Final answer:
The tunica albuginea is a dense connective tissue layer that covers and divides the testes into lobules.
Step-by-step explanation:
The tunica albuginea is a tough, white, dense connective tissue layer covering the testis itself. Not only does the tunica albuginea cover the outside of the testis, it also invaginates to form septa that divide the testis into lobules. These lobules are separated from one another by internal walls called septa. The microscopic anatomy of the testes includes the tunica albuginea and septa, which help to divide the testis into lobes.