- published: 16 Sep 2013
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Cnidaria (/naɪˈdɛəriə/) is a phylum containing over 10,000species of animals found exclusively in aquatic (freshwater and marine) environments: they are predominantly marine species. Their distinguishing feature is cnidocytes, specialized cells that they use mainly for capturing prey. Their bodies consist of mesoglea, a non-living jelly-like substance, sandwiched between two layers of epithelium that are mostly one cell thick. They have two basic body forms: swimming medusae and sessile polyps, both of which are radially symmetrical with mouths surrounded by tentacles that bear cnidocytes. Both forms have a single orifice and body cavity that are used for digestion and respiration. Many cnidarian species produce colonies that are single organisms composed of medusa-like or polyp-like zooids (hence they are trimorphic), or both. Cnidarians' activities are coordinated by a decentralized nerve net and simple receptors. Several free-swimming Cubozoa and Scyphozoa possess balance-sensing statocysts, and some have simple eyes. Not all cnidarians reproduce sexually, with many species having complex life cycles of asexual polyp stages and sexual medusae. Some, however, omit either the polyp or the medusa stage.
The giant squid (genus Architeuthis) is a deep-ocean dwelling squid in the family Architeuthidae. Giant squid can grow to a tremendous size due to deep-sea gigantism: recent estimates put the maximum size at 13 m (43 ft) for females and 10 m (33 ft) for males from the posterior fins to the tip of the two long tentacles (second only to the colossal squid at an estimated 14 m (46 ft), one of the largest living organisms). The mantle is about 2 m (6.6 ft) long (more for females, less for males), and the length of the squid excluding its tentacles (but including head and arms) rarely exceeds 5 m (16 ft). Claims of specimens measuring 20 m (66 ft) or more have not been scientifically documented.
The number of different giant squid species has been debated, but recent genetic research suggests that only one species exists.
In 2004 Japanese researchers took the first images of a live giant squid in its natural habitat, and in July 2012 a live adult was first filmed in its natural habitat off Chichi-jima.
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A brief documentary I made to teach my high school science students about Cnidarians
Phylum Cnidaria This phylum is famous for having stinging cells. Jellyfish and sea anemones are phylum cnidaria examples. Phylum cnidaria characteristics include stinging cells, symmetry, and are all invertebrates. Keywords: cnidaria biology sponge porifera 15 evolution animalia species anemone coral polyp medusa jellies stinging animals classification cnidarian You may also enjoy.. The phylum cnidaria https://www.youtube.com/watch?v=AjM-WOeM3uA Cnidarian classification https://www.youtube.com/watch?v=f4h77EptlW4 -~-~~-~~~-~~-~- Please watch: "Study Skills Teacher's Secret Guide to your Best Grades" https://www.youtube.com/watch?v=f3bsg8gaSbw -~-~~-~~~-~~-~-
This video breaks down the 5 classes of the phylum cnidaria.
This video lecture from Kingdom Animalia (F.Sc. First Year Biology) covers Phylum Cnidaria (radially symmetrical animals). Body structure, organs and organ systems, feeding behavior, and reproduction in phylum Cnidaria have been discussed in detail. The lecture also elaborates alternation of generation, life cycle, and polymorphism in the phylum. Representative members of the phylum have been discussed with emphasis on Corals. Find more e-learning material and educational video lectures in Urdu at maktab.pk. These videos are free to use for promotional and commercial purpose by keeping the credits to Maktab.
Ark: Survival Evolved - Patch 253 - Tusoteuthis , Cnidaria , Giant Squid! Today We check out update 253.0 With the new additional dinosaurs;Tusoteuthis , Cnidaria (Giant Squid , Jelly Fish) also in the next video we check out the Therizinosaurus , Pegomastax , Troodon As a man or woman stranded naked, freezing & starving on a mysterious island, you must hunt, harvest, craft items, grow crops, & build shelters to survive. Use skill & cunning to kill, tame, breed, & ride Dinosaurs & primeval creatures living on ARK, and team up with hundreds of players or play locally! Support:(how to get on my private ark server) Patreon:https://www.patreon.com/user?ty=h&u;=3354281 Community Discord:https://discord.gg/eQhKjp9 Media: http://www.twitch.tv/demostorm101 https://twitter.com/TheDemoStorm
Hank introduces us to the "simplest" of the animals, complexity-wise: beginning with sponges (whose very inclusion in the list as "animals" has been called into question because they are so simple) and finishing with the most complex molluscs, octopuses and squid. We differentiate them by the number of tissue layers they have, and by the complexity of those layers. Crash Course Biology is now available on DVD! http://dft.ba/-8css Like CrashCourse on Facebook: http://www.facebook.com/YouTubeCrashCourse Follow CrashCourse on Twitter: http://www.twitter.com/TheCrashCourse Table of Contents: 1) Porifera 1:33 2) Cnidaria 2:36 a) Diploblasts 2:48 3) Platyhelminthes 3:33 a) Triploblasts 3:56 b) Coelom 4:36 4) Biolography 5:36 5) Nematoda 7:26 6) Rotifera 7:57 7) Molusca 8:33 References for th...
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this is my mucous membranes versus the Port of Vancouver. Viewer discretion is advised. I don't consider this sexual nudity, because it's in the context of Meat not Sensuality.
For sightless invertebrates filled with non-living jelly, cnidarians exhibit a number of remarkably complex evolutionary adaptations that allow them to thrive in a number of different environments. This video explains the secrets to their success. The Evergreen State College, 2016
Fresher jellies: https://vimeo.com/188425683 Drowning, although terrifying, seems like it would be the most peaceful way to die. Music: Everything You Ever V.S Corona Radiata by Jed Whedon/Joss Whedon & Nine Inch Nails Respectfully enmeshed. Software: Cinema 4D After Effects Photoshop
The jellyfish Olindias sambaquiensis Muller, 1861 is common in the Southeastern and Southern costs of Brazil, especially during winter and spring. Behind its beautiful, vivid colors and graceful swimming there is a danger: it stings beachgoers and swimmers. Although most accidents are mild or harmless, they are painful; this species is responsible for about 80% of the accidents caused by marine organisms in the Southern and Southeastern coasts of Brazil (Vidal Haddad Jr., pers. commun). The umbrella of an adult specimen may reach 10 cm wide. Around the umbrella margin there are 3 types of tentacles. The dark red or brownish primary tentacles are relatively short and rigid, and are inserted above bell margin; they are usually kept still, being provided with cnidocyst clusters in transverse...
Colonies of polyps transported by prevailing winds, velella drift at the surface of warm seas. Plankton Chronicles Project by Christian Sardet, CNRS / Noe Sardet and Sharif Mirshak, Parafilms See Plankton Chronicles interactive site: planktonchronicles.org [taxonomy:binomial=Velella velella] [taxonomy:kingdom=Animalia] [taxonomy:phylum=Cnidaria] [taxonomy:class=Hydrozoa] [taxonomy:order=Anthoathecata] [taxonomy:family=Porpitidae] [taxonomy:genus=Velella]
You suffocate all
You're dying so await your fall
You're begging like a pig for crumbs
So lick the plate clean until your lips are cold and
numb
Off with your own head. Change your footsteps.
Why do you choose to bury your father and sons?
Let the dead bury the dead; your father and sons
The dead bury the dead.
The knife is to your own neck. Follow me.
Taste the life. Leave all that is dead behind.
Dead bury the dead.
I am wretched skin in vain but I will not collapse
My foundations will not crumble or see decay
When the last candle burns out will you find your way?
Will you stumble? Will you regret your path; your name?
The dead bury the dead again, again, again.
Bury the dead.
The knife is to your own neck. Follow me.
Taste the life. Leave all that is dead behind.
Dead bury the dead.
Are you dying from inside?
Are you suffering?
Progress is a choice in life.
Face down, don't turn your back on me.
Where's your dedication? Your fight?
The annihilation of your pride.
I want! I want! I need! I need! and I want!
I want for you to open up your eyes
Envision all that is unseen.
You will follow all that is revealed.
You will follow because your light is growing dim.