Hydra tentacle, light micrograph

Numéro d’image : 13674079
Hydra tentacle, light micrograph
Light micrograph of a Hydra. Close-up of a tentacle. Hydras are small fresh-water animals with a tubular body. They are invertebrates where the free end of the body is a mouth opening surrounded by one to twelve thin, mobile tentacles. Each tentacle, or cnida is clothed with highly specialised stinging cells called cnidocytes. Cnidocytes contain specialized structures called nematocysts, which look like miniature light bulbs with a coiled thread inside. Upon contact with prey, the contents of the nematocyst are explosively discharged, firing a dart-like thread containing neurotoxins into whatever triggered the release which can paralyse the prey, especially if many hundreds of nematocysts are fired. Magnification: x275 when printed at 10 centimetres wide at its longest edge.
Licence : Droits gérés
Crédit: Science Photo Library / HAKAN KVARNSTROM
Taille de l’image : 6000 px × 4000 px
Model Release : Non requis
Property Release : Non requis
Restrictions : -

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