All Cnidarians have nematocysts as a specialized organelle. Cnidarians use their nematocysts to capture prey and as a defense mechanism against predators.
A nematocyst is a specialized organelle found in all cnidarians. Each nematocyst features a coiled, threadlike tube lined with a series of barbed spines. The nematocyst is used to capture prey and may also be used for defense purposes. When it is triggered to discharge, the extremely high osmotic pressure within the nematocyst (140 atmospheres) causes water to rush into the capsule, increasing the hydrostatic pressure and expelling the thread with great force. The barb instantly penetrates the prey, stinging it with a highly toxic protein.
It is a cell that can be found on the tentacles of jellyfish. They help jellyfish alot because jellyfish don't have teeth, a jaw, or protective body parts so the nematocyst cells help them capture prey by their sting.they also help jellyfish as a defense mechanism.
Cnidarians are specialized carnivores, using the toxin in harpoonlike structures called nematocysts to capture relatively large and complex prey.
Answer:
They inject toxins into prey.
Cnidocytes and nematocysts are stinging cells, stunning and reeling in prey with minuscule harpoons. They keep prey from escaping as they're brought to the mouth. ^^
Nematocysts
Cnidarians all have stinging cells called nematocysts with which to catch their prey.
cnidarians have stinging cells called nematocysts located on their tantacles
jellyfish and mosquitoes are two creatures that have nematocust a stinging cell used by animals hunting and stunning their prey
The nematocysts are stinging cells of cnidarians located all along the feeding tentacles. These cells are inverted "harpoons" that react physically and chemically to stimuli at a speed of 1/1000th of a sec.
Starfish are cnidarians. They have spiny skin, some have nematocysts (stinging cells) and are generally toxic.
Nematocysts are the stinging cells on tentacles of a cnidarian, like a jellyfish. Since jellyfish don't have any teeth, and their body consists of gelatin, it's hard to capture prey. Nematocysts help jellyfish with feeding by stinging the prey in an attempt at trying to immobilizing the prey.
Nematocysts are specific to the phylum Cnidaria, which contains sea anemones, corals, and jellyfish, along with some less well-known animals. Nematocysts are the most common form of cnidocytes, the general term for the stinging cells all cnidarians possess.
The nematocysts allow the animal to hold the prey and venom is injected. The venom is often a neurotoxin that disables the prey and prevents too much damage to the soft bodied cnidarian. There are also chemicals injected that begin the digestion process. When the prey is ingested, more digestive chemicals are used.
All cnidarians live in water, have tentacles with specialized stinging cells called nematocysts, and have an internal sac for digestion which is called the gastrovascular cavity.
All cnidarians live in water, have tentacles with specialized stinging cells called nematocysts, and have an internal sac for digestion which is called the gastrovascular cavity.
Comb jellies are somewhat different from true jellies (cnidarians). They lack stinging nematocysts and have developed other strategies to feed and protect themselves. Some of these include oral lobes to capture prey and sticky tentacles.