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The hydra is a member of the Coelenterate phylum, which is characterized by having two cell layers, and a hollow body with only one opening. The hydra is a small organism. It’s one opening, the mouth, is surrounded by tentacles, which move food into the mouth and digestive cavity.
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faculty.plattsburgh.edu/margaret.campion/seconded/lucas...
faculty.plattsburgh.edu/margaret.campion/seconded/lucas/Hydra.htm
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The Hydra is an excellent organism for the study of the polyp form of the Phylum Cnidaria. Although a very simple organism, it illustrates a definite level or organization into tissues.
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kentsimmons.uwinnipeg.ca/16cm05/16labman05/lb5pg3.htm
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Notes : The Hydra is a very distinctive creature with its tentacles. If a jar of pond water with some weed ... They are a classic organism for biology students to study as they are a representative member of the Phylum Cnidaria. The cnidarians are the most primitive animal where the cells are organised into different layers.
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www.microscopy-uk.org.uk/ponddip/hydra.html
www.microscopy-uk.org.uk/ponddip/hydra.html
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The hydra caught the daphnid at 5:20. By 5:25 the hydra's mouth had expanded noticeably, covering about half of one side of ... The brown hydra, H. oligactis, is the largest of the common hydrozoans. It is said that this species sometimes causes problems at fish hatcheries by eating the small fry. You'd better believe it.
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www.microscopy-uk.org.uk/mag/artsep01/rahydra.html
www.microscopy-uk.org.uk/mag/artsep01/rahydra.html
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Hydra is a genus of simple, fresh-water animals possessing radial symmetry . Hydras are predatory animals belonging to the phylum Cnidaria and the class Hydrozoa . They can be found in most unpolluted freshwater ponds, lakes and streams in ...
http://wiki.answers.com/Q/Where_do_hydra_the_organism_l...
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In primitive animals such as Hydra, a marine organism related to jellyfish and sea anemones, the nervous system consists of a diffuse net of individual nerve cells and fibres. ... In primitive animals such as Hydra, a marine organism related to … [Credits : Encyclopædia Britannica, Inc.]
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www.britannica.com/EBchecked/topic-art/409641/70843/In-...
www.britannica.com/EBchecked/topic-art/409641/70843/In-primitive-animals-such-as-Hydra-a-marine-organism-related
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Sea anemones, corals, jellyfish, sea pens, hydra ... Between the two cell layers is the mesoglea, which ranges from little more than a glue to bind the layers (for example, in Hydra) to the vast bulk of the animal (for example, in jellyfish of Class Scyphozoa). The body encompasses a single sac-like body space,
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tolweb.org/tree?group=Cnidaria&contgroup=Animals
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cannabinoids go a long way down the phylogenetic tree ... Finding of the endocannabinoid signalling system in Hydra, a very primitive organism: possible role in the feeding response by; De Petrocellis L, Melck D, Bisogno T, Milone A, Di Marzo V; Istituto di Cibernetica, C.N.R., Napoli, Italy.
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www.biopsychiatry.com/thcmunch.htm
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Hydra, a fresh water coelenterate, has a relatively simple, but well-defined, morphology and also a strong regenerative capacity. These properties make this animal potentially a good model organism for studying the principles of biological pattern formation.
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www.nig.ac.jp/labs/OntoGen/home.html
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