Nematocyst UPSC NOTE


  • Evolution has come up with many strange ways to help animals defend themselves. 

  • One is a specialised cell called a nematocyst.

  • Nematocysts are found in some animals, but especially jellyfish, corals, sea anemones, and hydras, that serve as potent weapons to hunt prey and fend off predators.

  • Each nematocyst consists of a capsule containing a coiled, thread-like tubule and a bulbous structure with toxins. 

  • When stressed, the nematocyst rapidly ejects the tubule, often with an acceleration surpassing that of a bullet. 

  • Nematocysts play a crucial role in the feeding and defence strategies of cnidarians in particular

  • Cnidarians are animals that contain cells called cnidocytes. 

  • When potential prey comes into contact with a cnidocyte, specialised sensory structures on the cell’s surface trigger the release of the nematocyst. 

  • The tubule then unfurls, piercing the prey’s outer layer or injecting toxins into its body.



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Learnerz IAS | Concept oriented UPSC Classes in Malayalam: Nematocyst UPSC NOTE
Nematocyst UPSC NOTE
Learnerz IAS | Concept oriented UPSC Classes in Malayalam
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