At the beginning of the movie, Osmosis Jones is flying in a helicopter in Bill Murray's mouth, (the first animation scene.) When the helicopter pilot says something to Osmosis, Osmosis is looking at a magazine with a centerfold. A close up shot reveals that the centerfold is of a DNA strand. The helicopter pilot says something else to Osmosis that makes him mad, and Osmosis throws down his magazine. If you pause and then progress frame by frame before Osmosis throws the magazine down, you can see that as it falls to the ground the centerfold is no longer of a DNA strand, but of a female cell person bending over. My guess is that this is what the centerfold was originally going to be, but after it got changed for whatever reason they forgot to change this part since it is only about three frames long.