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| | Cnidocyte - Wikipedia, the free encyclopedia |
 | | The most deadly cnidocytes (to humans, at least) are found on the box jellyfish's body. | | | While the nematocyte itself is able, under some conditions, to fire independently, this presents several problems for the cnidarian. | | | Such specificity has been utilized to create novel medicines and bioinsecticides. |
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http://en.wikipedia.org/wiki/Cnidocyte
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| | EM PROJECT: CHARLES MOFFET |
| | Within the cnidocytes is the nematocyst which is an inverted tubule armed at one end with a harpoon exhibiting hooks and spines (Watson 1988). | | | This structure acts as a mechanical trigger (Hickman et al., 1988), which when triggered, discharges the nematocyst everting the harpoon-like structure out of the capsule into the tissue of the prey (Brusca & Brusca 1990) (Figure 1). | | | Although a number of ultrastructural studies have been made on the cnidocytes of individual life stages of cnidarians no studies have been conducted on these cells at the different life stages of the organism. |
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http://www.csulb.edu/~zedmason/emprojects/charlie/moffet.html
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| | Jellyfish Newsletter Number 2 |
| | Cnidocyte mechanoreceptors are tuned to the movements of swimming prey by chemoreceptors. | | | They have seen the cnidocyte within the tentacles advance superficially within the epithelium and retreat into a "silo" like structure. | | | Endean and Rifkin reported a sequel to their work describing the ultramicroscopic morphology of nematocyst discharge in box-jellyfish. |
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http://medschool.umaryland.edu/Dermatology/Jellynewslet/number2.htm
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| | Cnidocyte |
| | Volvent: Lasso like string that is fired at prey and wraps itself around a cellular projection on the prey. | | | Cnidocytes are prey-capture and defensive cells found on animals of the phylum Cnidaria. | | | Cnidocytes have unique cell structures in them called nematocysts that are used to capture prey. |
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http://www.ebroadcast.com.au/lookup/encyclopedia/cn/Cnidocyte.html
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| | Digital Zoology: Lectures |
| | My own favorite example of flatworm defense are flatworms that prey upon the cnidocyte ladened tentacles of some cnidarians. | | | cnidocyte without firing its toxic stinger and the cells migrate from the digestive system to the epidermal surface where they are recruited in defense of the flatworm! |
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http://salinella.bio.uottawa.ca/bio2125/Lectures/default.php?2125_lect06_Plat.php??E?Md2ChapterMcp1
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| | cnidaria |
| | There are two general forms that a cnidarian may have and they may even have both forms within their lifetime. | | | Cnidaria takes its name from cells called cnidocytes, which give them their most distinguished and painful characteristic...the ability to sting. | | | They are characterized by having radial or biradial symmetry, which means all body parts are arranged concentrically around an axis. |
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http://www.swsd.k12.pa.us/~todd_barshinger/module/cnidaria.htm
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| | Wonders of the Sea: Cnidarians |
| | A common example of radial symmetry is the sea star (see our guide on Echinoderms!). | | | The harpoon-like thread punctures through the cnidocyte wall and into the prey. | | | Yet, these diverse animals are united because they are all armed with stinging cells called cnidocytes and contain a structure called a nematocyst. |
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http://www.oceaninn.com/guides/cnidarians.htm
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| | [Cnidaria] cladonema |
| | Does anyone have any or access to any as it would greatly assist my research into cnidocyte discharge. | | | To everyone, I am trying to obtain a capitate hydroid with well developed cnidocyte clusters that we can culture, such as cladonema. | | | Previous message: [Cnidaria] Fwd: a question from a student of biology |
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http://maillists.uci.edu/mailman/public/cnidaria/2002-November/000321.html
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| | Hydra Laboratory Exercise |
| | Cnidocytes are found only in the epidermis and germ cells arise in the gastrodermis but may, or may not, migrate to the epidermis to form gonads and mature into gametes. | | | All cnidarians are carnivores feeding on live prey which they usually capture using tentacles armed with cnidocytes. | | | Characteristic of the epidermis, they are also sometimes found in the gastrodermis. |
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http://www.lander.edu/rsfox/310hydra.html
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| | Tentacle - Psychology Central |
| | Cnidocytes are cells containing a coiled thread-like structure called nematocyst, which can be fired at potential prey. | | | Cnidarians often have huge numbers of cnidocytes on their tentacles. |
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http://psychcentral.com/psypsych/Tentacle
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| | Oceanlink marine sciences education and fun |
| | Another type of polyp is the gonozooid, which is responsible for reproduction. | | | The nematocysts and spirocysts are the "darts" that a cnidocyte "throws" in response to stimuli, and may contain toxins, adhesives and other functional molecules. | | | Cnidocytes generally function in prey capture and defence, and vary by virtue of the type of nematocyst or spirocyst that each contains (and there is a whole smorgasbord of nematocyst types and functions). |
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http://oceanlink.island.net/ask/cnidaria.html
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| | CSM - Tropical coral |
| | The cnidocytes on the tentacles capture and paralyse the prey, and then the tentacles convey it to the mouth. | | | When capturing their prey, the Cnidaria use a type of cell which is characteristic of the whole group, the cnidocyte. | | | This is a sensorial secreting cell, 30 types of which have been described in the Cnidaria phylum. |
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http://www.centrescientifique.mc/csmuk/corail_tropical6.php
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| | Re: How do comb jellies differ from true jellyfish? |
| | There are some other animals that contain cnidocytes in their tissues, but they don't generate the cnidocytes themselves. | | | Instead, they very cleverly steal the cnidocytes from their cnidarian prey and sequester them, unfired, in their own tissues to make themselves unpalatable to their own predators. | | | The diagnostic cell for this phylum is called a cnidocyte. |
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http://www.madsci.org/posts/archives/apr2001/988035596.Zo.r.html
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| | Handouts from Episode 16 |
| | The resulting organism resembles a gargantuan jellyfish and is often referred to by our scientific staff as a secondary cnidocyte. | | | Cnidocyte, Secondary: "Secondary specimens originate in earthborn fauna when the C. cnidarae infection is allowed to run its course. | | | If large sections of the secondary cnidocyte are removed, those sections sometimes maintain independent mobility and are called tertiary cnidocytes. |
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http://members.aol.com/playersdm/inter16b.html
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| | Re: Do the darts on a sea anemone actually detach from the tentacles? |
| | Even if most of the cnidocytes are blown out during a feeding bout, the anemone can probably replace its arsenal within a day or so. | | | Once the thread is everted, it cannot be retrieved and recoiled back into the capsule, so nematocysts are definitely one-use-only structures. | | | Each cnidocyte can be used only once, and here's an explanation for why: Inside the cnidocyte is a capsule called a cnida. |
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http://www.madsci.org/posts/archives/apr2001/987118887.Zo.r.html
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| | Cnidocyte - definition of Cnidocyte in the Medical dictionary - by the Free Online Medical Dictionary, Thesaurus and ... |
| | Cnidocyte - definition of Cnidocyte in the Medical dictionary - by the Free Online Medical Dictionary, Thesaurus and Encyclopedia. | | | This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. | | | A capsule within specialized cells of certain coelenterates containing a barbed, threadlike tube that delivers a paralyzing sting. |
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http://medical-dictionary.thefreedictionary.com/Cnidocyte
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| | Cnidarian Biology |
| | All cnidarians are carnivorous, using cnidocytes on their tentacles to capture prey. | | | When touched, the nematocyst discharges, causing the thread to be rapidly everted, injecting poison into the prey or wrapping around and entangling it. | | | Each cnidocyte contains a stinging organelle called the nematocyst, which is a small capsule with a coiled thread or filament. |
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http://bioweb.uwlax.edu/zoolab/Table_of_Contents/Lab-3a/Cnidarian_Biology/cnidarian_biology.htm
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| | Zooplankton |
| | The entire discharge process takes less than 3 milliseconds! | | | Cnidocyte cells are only used once and get replaced within 48 hours after discharge. | | | The open ocean is therefore a source of zooplankton that gets washed over the reef in currents and is stripped from the water by planktivorous fish and filter feeding organisms. |
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http://www.coexploration.org/bbsr/coral/html/body_zooplankton.html
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| | Cnidaria: Encyclopedia topic |
| | Cnidarians get their name from cnidocyte (cnidocyte: more facts about this subject) s, which are specialized cells that carry stinging organelle (organelle: A specialized part of a cell; analogous to an organ) s. | | | Gk knide "nettle") is a phylum (phylum: (biology) the major taxonomic group of animals and plants; contains classes) containing some 10,000 species (species: (biology) taxonomic group whose members can interbreed) of relatively simple animals (animals: A living organism characterized by voluntary movement) found exclusively in aquatic environments (most species are marine). | | | The name Coelenterata is sometimes applied to the group, but as it is taken to include the similar Ctenophores (Ctenophores: Biradially symmetrical hermaphroditic solitary marine animals resembling jellyfishes having for locomotion eight rows of cilia arranged like teeth in a comb) (comb jellies), it has been abandoned. |
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http://www.absoluteastronomy.com/reference/cnidaria
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| | [Cnidaria] Cnidocyte batteries |
| | If by isolated batteries you mean free of neurons then the medusa is a good choice. | | | These polyps (gastrozooidds and dactylozooids) also have an isolated cnidocyte battery at the tops of their "heads", above the mouth. | | | Years ago, I did manage to get simultaneous and complete discharge of all cnidocytes in the cnidocyte battery of the polyp using electrical stimulation. |
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http://maillists.uci.edu/mailman/public/cnidaria/2003-February/000434.html
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| | Protostomes I |
| | Cnidocyte replacement (within 48 hours from interstitial cells) |
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http://paws.wcu.edu/dperlmutr/jellyfish.html
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| | cnidocyte - OneLook Dictionary Search |
| | cnidocyte : The On-line Medical Dictionary [home, info] | | | We found 2 dictionaries with English definitions that include the word cnidocyte: | | | Tip: Click on the first link on a line below to go directly to a page where "cnidocyte" is defined. |
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http://www.onelook.com/?w=cnidocyte
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| | Glossary for Invertebrate Zoology |
| | Cnidocil A short, stiff, bristle‑like cilium that is borne on a cnidocyte. | | | Cnida (pl. Cnidae) An eversible cnidarian organelle that occurs in a cnidocyte. | | | Cnidocyte A cnidarian cell that contains an eversible cnida. |
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http://www.lander.edu/rsfox/310glossaryLab.html
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| | PPT Slide |
| | Each cnidocyte has a modified cilium - cnidocil, and is armed with a stinging structure called a nematocyst. | | | When triggered to release, either by touch or chemosensation, the nematocyst is released from the cnidocyte and the coiled thread is everted | | | Prey capture is enhanced by use of specialized stinging cells called cnidocytes located in the outer epidermis. |
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http://faculty.evansville.edu/de3/b10802/PPoint/Cnidaria/tsld006.htm
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| | [No title] |
| | This site shows the structure of a cnidocyte. | | | Investigate cnidocytes, the stinging cells of cnidarians (nematocyst), start at the two links below! | | | This National Aquarium at Baltimore site shows a cnidocyte firing. |
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http://www.nvsd44.bc.ca/sites/ReportsViewOnePoPM.asp?RID=2661
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| | Quia - Unit 4: Stinging cell animals |
| | What is the structure on the cnidocyte called that causes the cnidocyte to fire its nematocyst?, | | | Where are the stinging cells of cnidarians located?, |
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http://www.quia.com/jg/351218list.html
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| | Phylum Cnidaria-BY255L Invertebrate Zoology |
| | Characteristic is the cnidocyte (nettle cell which contains a capsule, the nematocyst, which can eject a stinging harpoon-like structure. | | | Usually has alternation of generations between polyp and medusa. |
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http://www.dpo.uab.edu/~acnnnghm/BY255L/BY255L-Cnidaria.htm
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| | Cnidocyte |
| | This Illustrates the Structural Features of a Cnidocyte | | | This cell type, prevalent on tentacles, produces structures called nematocysts. | | | This page was last updated on January 10, 1999. |
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http://tidepool.st.usm.edu/crswr/cnidocyte.html
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| | Cnidaria at AllExperts |
| | Cnidarians get their name from cnidocytes, which are specialized cells that carry stinging organelles. | | | Cnidaria is a phylum containing some 10,000 species of relatively simple animals found exclusively in aquatic environments (most species are marine). | | | The corals, which are important reef-builders, belong here, as do the familiar sea anemones, jellyfish, sea pens, sea pansies and sea wasps. |
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http://experts.about.com/e/c/cn/Cnidaria.htm
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| | Glossary |
| | the small barbed harpoon contained in the cnidocyte that spears prey |
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http://www.fcps.k12.va.us/westspringfieldhs/academic/science/1project/zoo00/zoo00/glossary.shtml
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| | [No title] |
| | Sensory nerve cells can also be seen between the c | | | Cnidocil and operculum with the coiled tube still contained in the cnidocyte. |
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http://biodidac.bio.uottawa.ca/thumbnails/catquery.htm?Kingdom=Animalia&phylum=Cnidaria
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| | Practice Exam for BIO 311 |
| | The cnida, or harpooning-like threads, that are discharged from the cnidocyte of Cnidarians is secreted by the: a. |
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http://faculty.ncwc.edu/ekosal/invert/practice_exam_for_bio_311.htm
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| | pronunciation cnidocyte |
| | Check out our pronunciation cnidocyte web site top picks below. | | | These pronunciation cnidocyte websites are ranked in order of popularity. |
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http://www.reptile-food-inc.com/catalog/pronunciationcnidocyte
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| | Cnidarian Characters |
| | Figures A through D represent the earliest stage in cellular ontogeny through to that of the mature nematocyst respectively. | | | c, cnidocyte; np, nematocyst primordium; it, inverted tubule; s, differentiating sporogenic cells. | | | c, cnidocyte; pt, preinverted tubule; np, nematocyst primordium; th, tubular thread; Scale bar = 1 um. |
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http://research.amnh.org/~siddall/myxozoa/cnid_char.html
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| | Z250 - Lec8/9 Outline- Cnidaria |
| | 1) A well defined phylum of about 10,000, mostly marine, predatory species; united by a unique cell type: cnidocyte with nematocyst | | | a) a cnidocyte contains a nematocyst (capsule with an inverted coiled tube & operculum) and a cnidocil (sensory cilium) |
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http://www.biology.ualberta.ca/courses.hp/zool250/LecOutl-97/LecOutl/outl08.htm
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| | [No title] |
| | ENGLISH - Slide 1:ANTH001B sagittal section of sea anemone; 2:CNID001B epithellial cells; 3:CNID003B cnidocyte structure; 4:CNID004B cnidocyte discharging; 5:CNID005B cross section of body wall; 6:CNID007B cnidocyte discharging | | | FRANCAIS - Diapositive 1:ANTH001B coupe sagittale d'anémone de mer; 2:CNID001B cellules épitheliales; 3:CNID003B morphologie d'un cnidocyte; 4:CNID004B cnidocyte déchargé; 5:CNID005B paroi du corps; 6:CNID007B cnidocyte déchargé |
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http://biodidac.bio.uottawa.ca/thumbnails/catquery.htm?Kingdom=Animalia&Phylum=Cnidaria&category=ppt
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