What are the 2 layers of testes

There are two layers of the tunica vaginalis: the visceral and the parietal. The visceral layer overlies the tunica albuginea (middle layer of the tunica) while the parietal layer lines the scrotal cavity.

Agroup of engineering students from purdue university reported that its licking machine, modeled after a human tongue, took an average of 364 licks to get to the center of a tootsie pop. twenty of the group's volunteers assumed the licking challenge-unassisted by machinery-and averaged 252 licks each to the center.