NEET BIOLOGY

Detailed explanation-1: -The name Cnidaria comes from the Greek word “cnidos, ” which means stinging nettle. Casually touching many cnidarians will make it clear how they got their name when their nematocysts eject barbed threads tipped with poison.

Detailed explanation-2: -noun. any invertebrate animal, as a hydra, jellyfish, sea anemone, or coral, considered as belonging to the phylum Cnidaria, characterized by the specialized stinging structures in the tentacles surrounding the mouth; a coelenterate. adjective. belonging or pertaining to the Cnidaria.

Detailed explanation-3: -cnidarian, also called coelenterate, any member of the phylum Cnidaria (Coelenterata), a group made up of more than 9, 000 living species. Mostly marine animals, the cnidarians include the corals, hydras, jellyfish, Portuguese men-of-war, sea anemones, sea pens, sea whips, and sea fans.

Detailed explanation-4: -Cnidocytes (“cnidos is Greek for “stinging nettle”), common to species in the diverse phylum Cnidaria, can launch a toxic barb or blob or enable cnidarians to stun prey or deter invaders. Cnidarians are the only animals that have cnidocytes, but lots of animals have neurons, Babonis said.

Detailed explanation-5: -Cnidarians have a unique feature: stinging cells called cnidocytes (NID-uh-sites). Each cnidocyte cell has a long, coiled, tubular harpoon-like structure, called a nematocyst (Greek root word nema meaning thread; Greek root word cyst meaning bag).