cnidocyte

The general colour is grey or brown with the cnidocyte area cream coloured.

At the narrow outer edge of the cnidocyte is a short trigger hair called a cnidocil.

The immature cnidocyte is referred to as a cnidoblast.

When a cnidocyte fires, the finger pops out.

The thread, which is an extension of the "finger" and coils round it until the cnidocyte fires.

This causes a large concentration gradient of calcium across the cnidocyte plasma membrane.

The main components of a cnidocyte are:

The cell which produces the nematocyst is variously called a cnidocyte, cnidoblast, or nematocyte.

A cnidocyte fires a structure that contains the toxin, from a characteristic sub-cellular organelle called a cnidocyst (also known as a cnida or nematocyst).

Each cnidocyte cell contains an organelle called a cnidocyst, which comprises a bulb-shape capsule containing a coiled hollow thread-like structure attached to it.

In his work Leeuwenhoek clearly described the process of budding, as well as tentacles contractility and the presence of cnidocyte batteries on tentacles.

Cnidae capsule stores a large concentration of calcium ions, which are released from the capsule into the cytoplasm of the cnidocyte when the trigger is activated.

These include the modified dermal denticle of the stingray, the venomous spurs on the hind legs of the male platypus, and the cnidocyte tentacles of the jellyfish.

A cnidocyte is an explosive cell containing one giant secretory organelle or cnida (plural cnidae) that defines the phylum Cnidaria (corals, sea anemones, hydrae, jellyfish, etc.).

Each nettle tentacle is coated with thousands of microscopic cnidocytes; in turn, every individual cnidocyte has a "trigger" (cnidocil) paired with a capsule containing a coiled stinging filament.

The supporting cells contain chemosensors, which, together with the mechanoreceptor on the cnidocyte (cnidocil), allow only the right combination of stimuli to cause discharge, such as prey swimming, and chemicals found in prey cuticle or cuteous tissue.

The back pressure resulting from the influx of water into the cnidocyte together with the opening of the capsule tip structure or operculum, triggers the forceful eversion of the cnidae tubule causing it to right itself as it comes rushing out of the cell with enough force to impale a prey organism.