This is a close-up of the unstained dermal tissue from the underside of the leaf of Broad bean (Vicia fiba). Taken through the ocular of Olympus EX microscope, with 40x objective lens using Canon PowerShot A75, scaled down. Little donut shaped structures are a two guard cells (halves of the donut) surrounding a dark oval of stomatic pore (or stomata). Jiggsaw puzzle pieces are epidermal cells. Little “bubbles” of salad green are chlorophills, both in guard cells, and in the epidermal cells. Stomatic pore actually has a bunch of small groves, similar to fingerprints, but they were lost due to camera shake.