This article caught my eye.  A neurobiologist won a micro-photography contest by snapping a picture of the carnivorous aquatic plant known as the "humped bladderwort".

http://www.livescience.com/41973-carnivorous-plant-image-wins-bioscapes-competition.html 

Been away for a while!  Anyway, here are some nice pictures.  In the first picture, we can see a human blood smear viewed at 400x magnification.  Clearly visible are numerous red blood cells along with some white blood cells.  The second picture is of cardiac tissue, with nuclei clearly visible due to staining.  One of the distinct features of cardiac tissue are the striations, which unfortunately are not visible in the picture.  For a good example of these striations, see the following:


http://www.kumc.edu/instruction/medicine/anatomy/histoweb/muscular/muscle16.htm