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A light microscope image of the epidermal layer of a cactus (unidentified) showing  numerous calcium oxalate crystals.  Calcium oxalate crystals in plants are called raphides, in humans they can appear as kidney stones. These crystals help remove calcium build up in the tissues and make it undesirable for herbivore animals to eat the plant.Photo taken at 40x.
A light microscope image of the epidermal layer of a cactus (unidentified) showing numerous calcium oxalate crystals. Calcium oxalate crystals in plants are called raphides, in humans they can appear as kidney stones. These crystals help remove calcium build up in the tissues and make it undesirable for herbivore animals to eat the plant.Photo taken at 40x.
Filename: K14-oxalatextal71.jpg
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