Stinging nettle leaf. Coloured scanning electron micrograph (SEM) of a stinging nettle leaf (Urtica dioica). Its long poisonous hairs protect the plant from herbivores. When touched,they cause pain and inflammation to the skin by inducing the release of a mixture of acetylcholine (a neurotransmitter that activates nerve cells) and histamine (a substance produced in allergic reactions). Magnification: x219 when printed 10 centimetres high | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Diller, Stefan |
Bildgröße: | 4065 px × 5173 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |