Stinging Nettle, Sem Wood Print

wood prints alternative medicine wood prints anti-inflammatory wood prints colorized wood prints medicine wood prints micrograph wood prints plant wood prints sem wood prints stem wood prints stinging nettle wood prints traditional chinese medicine wood prints urtica dioica wood prints

photographs alternative medicine photos anti-inflammatory photos colorized photos medicine photos micrograph photos plant photos sem photos stem photos stinging nettle photos traditional chinese medicine photos urtica dioica photos

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Scanning electron micrograph of the stem from a stinging nettle (Urtica dioica). The large stinging hairs are hollow tubes which act like tiny glass needles. The bulb at the base of each hair contains the stinging liquid (including formic acid, histamine and acetylcholine). The tips of the glassy hairs are easily broken when brushed, which easily pierces the skin to deliver the sting. The plant and roots have been used historically in alternative medicine to treat a variety of conditions, possibly by decreasing inflammation and increasing urine output. Width of image is 3 mm.