Coral
Query URLs
https://term.museum-digital.de/md-de/tag/38087
- Note
- Corals are marine invertebrates within the class Anthozoa of the phylum Cnidaria. They typically form compact colonies of many identical individual polyps. Coral species include the important reef builders that inhabit tropical oceans and secrete calcium carbonate to form a hard skeleton.
A coral "group" is a colony of very many genetically identical polyps. Each polyp is a sac-like animal typically only a few millimeters in diameter and a few centimeters in height. A set of tentacles surround a central mouth opening. Each polyp excretes an exoskeleton near the base. Over many generations, the colony thus creates a skeleton characteristic of the species which can measure up to several meters in size. Individual colonies grow by asexual reproduction of polyps. Corals also breed sexually by spawning: polyps of the same species release gametes simultaneously overnight, often around a full moon. Fertilized eggs form planulae, a mobile early form of the coral polyp which, when mature, settles to form a new colony.
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Porträt von Susanne Elisabeth Angel
Das Bildnis zeigt die...
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Image: Stadtmuseum Simeonstift Trier - CC BY-NC-ND -
Zier- oder Schmucklöffel
Zier- oder Schmucklöffel aus...
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Image: (C) Sammlung Bergischer Geschichtsverein e.V. - CC BY-NC -
Statuette des heiligen Sebastian, 17. Jahrhundert
Die Statuete des hl....
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Image: Städtisches Museum Schloss Rheydt - CC BY -
Madonna mit der Korallenkette
Der Flügelaltar "Madonna mit...
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Image: Kulturstiftung Sachsen-Anhalt - CC BY-NC-SA -
Arznei- und Volksheilmittel
Diese Zusammenstellung...
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Image: Historisches Museum Hannover - CC BY-NC-SA
References
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