Stoma of a milkweed leaf (Asclepias sp), coloured scanning electron micrograph (SEM). Stomata (plural of stoma) are tiny openings in the epidermis of a plant that are surrounded by pairs of crescent-shaped cells, called guard cells, that facilitate gas exchange. Magnification: x300 when shortest axis printed at 25 millimetres. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / DENNIS KUNKEL MICROSCOPY |
Taille de l’image : | 4800 px × 3847 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |