Web Results

en.wikipedia.org/wiki/Coelenterata

Coelenterata is a term encompassing the animal phyla Cnidaria and Ctenophora (comb jellies). The name comes from the Greek "koilos" ("hollow") and "enteron" ( "intestine"), referring to the hollow body cavity common to these two phyla. They have very simple tissue organization, with only two layers of cells ... These tentacles surround a spacious cavity called the gastrovascular cavity ...

en.wikipedia.org/wiki/Cnidaria

Cnidaria is a phylum containing over 10,000 species 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 ... They have two basic body forms: swimming medusae and sessile polyps, ...

www.answers.com/Q/Cnidarians_are_also_called_Coelenterates_because_they_have

Cnidarians are also called Coelenterates because they have? ... They have a hollow Body Tentacles with stinging cells One body opening (mouth and anus) ...

www.britannica.com/animal/cnidarian

Cnidarian, also called coelenterate, any member of the phylum Cnidaria .... fact that cnidarians cannot be said to have true ovaries and testes because they lack  ...

www.encyclopedia.com/plants-and-animals/animals/zoology-invertebrates/cnidaria

Most cnidarians possess tentacles, and many also have nematocysts ... and leads to an internal digestive cavity called the gastrovascular cavity . ... One hypothesis about the origin of nematocysts suggests that they were .... the seacoasts everywhere, economically important because they foul surfaces. ..... Coelenterata.

artksthoughts.blogspot.com/2009/07/coelenterates-cnidarians-and-larvae.html

Jul 7, 2009 ... They have two archetypal body forms, the polyp and the medusa, and most lineages ... One of the shared features among them are cnidocytes (also called ... because they require more time and energy to modify their structure ...

encyclopedia2.thefreedictionary.com/Coelenterata

(sīlĕn'tərā`tə), another name for the phylum CnidariaCnidaria ... The central body cavity is the gastrovascular cavity, also called the enteron or coelenteron. ... The morphologically simplest coelenterates, the Hydrozoa, have nematocysts limited ... In most, the gametes are released to the external environment, where they are  ...

www.thefreedictionary.com/cnidarian

They have a single opening for ingesting food and eliminating wastes. Cnidarians include the jellyfishes, ... Also called coelenterate. The American Heritage® ...

www.biologycorner.com/worksheets/articles/hydra.html

... to a group of organisms known as cnidarians or sometimes called coelenterates. ... Because they belong to the animal kingdom, you can also assume that all ... Coral reefs are actually made from the skeletons of cnidarians that have build ... The ones that sit on a surface with their tentacles pointing up are called polyps.