Stinging nettle hairs. Polarised light micrograph of three stinging hairs from a stinging nettle (Urtica dioica) leaf. When brushed against,the hairs break off and their tips penetrate the skin,injecting a mixture of acetylcholine and histamine. These cause the painful and inflammatory response,respectively. Magnification: x90 when printed at 10 centimetres wide | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Wheeler, Dr. Keith |
Bildgröße: | 3509 px × 5290 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |