Stinging nettle stingers, light micrograph

Stinging nettle stingers, light micrograph

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Caption: Stinging nettle stingers. Polarised light micrograph of hairs (trichomes) on a stinging nettle (Urtica dioica). These hollow stinging hairs act like hypodermic needles, injecting histamine and other chemicals that produce a stinging sensation when contacted by humans and other animals. Magnification: x100 when printed 10 centimetres wide.

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Keywords: angiosperm, angiosperms, biological, biology, botanical, botany, cell, cells, close-up, detail, flora, hair, hairs, light micrograph, light microscope, lm, microscopy, nature, no-one, nobody, plant, plants, polarised light, section, sectioned, sting, stinging, stinging nettle, stings, tissue, transverse, trichome, trichomes, urtica dioica, wildlife

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