[Anatomophysiology of the male sexual apparatus in Galen].

Galen builds his andrology on animals dissections which he enlarges upon human anatomy by analogy, so it's very difficult to recognize the organs he describes, especially adenoeideis parastatai. His physiology of male sexual apparatus is based on the theory that semen comes from blood perfectly cooked in gonadics vessels and testicles. As usual, he tries to demonstrate Aristotle's principle on perfection of Nature's acts by experimentation, logic, imagination and sometimes insincerity.