Stinging nettle hair

Référence de la vidéo 11936970
Microscopic footage of a stinging hair of a stinging nettle plant (Urtica dioica). Initially the tip of the needle is seen, before showing fluid movement within the hair, and then the emission of the stinging chemicals. Nettles bear many stinging hairs on their stems and leaves, which act as needles that inject a solution into the skin that causes pain and inflammation. The stinging solution contains histamine, acetylcholine, serotonin and other chemicals, and causes painful welts. This acts to deter predators.
Licence : Droits gérés
Crédit : Science Photo Library / Nuridsany, Claude / Perennou, Maria
Model Release : Non requis
Durée : 33 Secondes
Aspect ratio : 4/3
Restrictions : -

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