When I am teaching evolution I often bring up the human testes to provoke some discussion - where is the testicular cage as with the ribs, cranium and pelvis? Why not have them safely tucked up inside the body? Ah they say they must be a couple of degrees below body temperature. Ah yes I say but why evolve like that? They are fairly vital kit in evolution after all.
I then pose the question that is it a good idea that males have to reproduce and excrete out of the same tube?
I would be very grateful if you could shed some light on this ready for this lesson next time
Head of Biology
Bristol Grammar School