EVERYDAY SCIENCE

Detailed explanation-1: -Nematocysts consist of a pressurized capsule containing a coiled harpoon-like thread. These structures are in turn built within specialized cells known as nematocytes.

Detailed explanation-2: -The nematocyst structure consists of a globular or egg-shape capsule, made up mainly of mini-collagens and the glycoprotein NOWA, which has an apical aperture closed by a cover (operculum) and an inverted long spiny tubule inside (11).

Detailed explanation-3: -Nematocysts or cnidocysts represent the common feature of all cnidarians. They are large organelles produced from the Golgi apparatus as a secretory product within a specialized cell, the nematocyte or cnidocyte. Nematocysts are predominantly used for prey capture and defense, but also for locomotion.

Detailed explanation-4: -Cnidarians contain specialized cells known as cnidocytes (“stinging cells”) containing organelles called nematocysts (stingers). These cells are present around the mouth and tentacles, and serve to immobilize prey with toxins contained within the cells.

Detailed explanation-5: -Nematoblasts (cnidoblasts) are stinging cells found in the outer epithelial surface of Cnidarians (coelenterates) like sea anemones and corals. They are used for anchorage, defence and for capturing the prey. Epithelial tissue originates from the ectoderm.