Stinging nettle leaf, SEM

Videonummer 11937709
Animated scanning electron micrograph (SEM) of the leaf of a stinging nettle (Urtica dioica). This plant has many hollow stinging hairs called trichomes on its leaves and stems. They act like hypodermic needles, injecting histamine and other chemicals that produce a stinging sensation when contacted by humans and other animals. Despite this defence, the stinging nettle has a long history of use as a medicine and as a food source.
Lizenzart: Lizenzpflichtig
Credit: Science Photo Library / Gschmeissner, Steve
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Länge: 10 Sekunden
Seitenverhältnis: 16:9
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