Observe carefully, you can see sperm heads moving around
photo courtesy of Ah Xian.
Just before our mouse dissection lab session, we took some sperm samples from our voluntary friends. Well, it's not voluntary though. We somehow choose to vote among us guys with the old method: cut a few pieces of paper, write some numbers on them, then we randomly pick the pieces of paper. Heh, luckily i wasn't chosen for that.
Anyway, to make things short. Just watch the video. Observe carefully!!