1. Leg of horse fly -- 2. Bird feather -- 3. Wing scales of butterfly -- 4. Human blood smear -- 5. Intestine of rabbit -- 6. Lung of cat, -- 7. Mixed zoological and botanical plankton -- 8. Pollen grains of different plants -- 9. Foliate leaf with netted venation -- 10. Large cells in marrow of elderberry. |