Cnidocyte

（重定向自Cnidocytes）

Nomarski micrograph of a ruthenium red-stained nematocyst from Aiptasia pallida, the pale anemone. The red dye stains the polyanionic venom proteins found inside the capsule of this partially discharged nematocyst.

A discharged nematocyst seen under a scanning electron microscope

A diagram of the discharge mechanism of a nematocyst

Nematocysts from Chironex fleckeri (400x magnification)

A cnidocyte (also known as a cnidoblast or nematocyte) is an explosive cell containing one giant secretory organelle or cnida (plural cnidae) that defines the phylum Cnidaria (corals, sea anemones, hydrae, jellyfish, etc.). Cnidocyte is also called the "stinging cell". Cnidae are used for prey capture and defense from predators. Despite being morphologically simple, lacking a skeleton and many species being sessile, cnidarians prey on fish and crustaceans. A cnidocyte fires a structure that contains the toxin, from a characteristic subcellular organelle called a cnidocyst (also known as a cnida or nematocyst). Nematocyst is also called the "stinging organ". The toxin is usually a hypnotoxin. This is responsible for the stings delivered by a cnidarian.

单词	Cnidocytes
释义	Cnidocytes 原声例句双语版 TED-Ed 演讲精选 Most species have tentacles covered in cells called cnidocytes, which contain venomous harpoons coiled and ready to launch. 大部分水母的触手上长满了刺细胞，刺细胞里有盘曲着蓄势待发的毒刺。英语百科 Cnidocyte （重定向自Cnidocytes） A cnidocyte (also known as a cnidoblast or nematocyte) is an explosive cell containing one giant secretory organelle or cnida (plural cnidae) that defines the phylum Cnidaria (corals, sea anemones, hydrae, jellyfish, etc.). Cnidocyte is also called the "stinging cell". Cnidae are used for prey capture and defense from predators. Despite being morphologically simple, lacking a skeleton and many species being sessile, cnidarians prey on fish and crustaceans. A cnidocyte fires a structure that contains the toxin, from a characteristic subcellular organelle called a cnidocyst (also known as a cnida or nematocyst). Nematocyst is also called the "stinging organ". The toxin is usually a hypnotoxin. This is responsible for the stings delivered by a cnidarian.
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