Radiole Lepe
A radiole is a heavily ciliated feather-like tentacle found in highly organized clusters on the crowns of Canalipalpata. Canalipalpata is an order of sessile marine polychaete worms consisting of 31 families (including the Sabellidae, Serpulidae, Terebellidae, and Alvinellidae, a family of deep-sea worms associated with hydrothermal vents). These benthic annelid tube worms employ radioles primarily for alimentation. While their primary role is to function as an organ for filter feeding, radioles also serve as respiratory organs. Because of their role in gas exchange, radioles are often referred to as " gills ". Anatomical location [ edit] Canalipalpata have a head located at the anterior end of the body. The head is formed by the fusion of a funnel-shaped, symmetrical peristomium with the prostomium. [1] [2] [3] The prostomium bears a specialized mouth appendage which is referred to as a branchial crown. The crown functions as both a sieve and a gill. The animal can extend the crown from its calcareous tube for feeding and gas exchange, and rapidly retract it when disturbed or threatened.
Lepe park
Radiolé (Spain)
Separation of the crown occurs at a pre-established zone of abscission, located at the base of the crown. [9] These animals have the ability to regenerate new radioles to replace those that have been amputated, or even the entire crown if necessary. [12] [13] Any would-be predators that pass by after a worm has lost its crown will get the impression that the worm has died; this protects the animal from further attack. The crown typically reappears after about two weeks. When it does reappear, it is initially smaller in size, but it eventually grows back to its former size and color. Specialized radioles [ edit] In addition to having ordinary radioles, some Canalipalpata possess one or more highly modified radioles located on the dorsal part of the head. This specialized structure is called an operculum. The operculum is a cone-shaped cartilaginous structure located at the distal end of a long cartilaginous stalk. When threatened or disturbed, the animal withdraws rapidly into its protective calcareous tube and employs the operculum as a plug to occlude the entrance to the tube.
Lepe house
Radiole - Spain | Live Online Radio
- Manuel lepe
- Lepe park
- The Wind in the Willows: The Open Road by Kenneth Grahame
Lepe beach
is tracked by us since April, 2011. Over the time it has been ranked as high as 298 499 in the world, while most of its traffic comes from Spain, where it reached as high as 6 215 position. It was owned by several entities, from Sociedad Espanola de Radiodifusion Gran Via 32 to Statutory Masking Enabled of Statutory Masking Enabled, it was hosted by NTT America Inc., Inc. and others. While NETWORK SOLUTIONS LLC. was its first registrar, now it is moved to Network Solutions LLC. Radiole has a high Google pagerank and bad results in terms of Yandex topical citation index. We found that is heavily 'socialized' in respect to Google+ shares (192K), Facebook shares (101K) and Twitter mentions (2). According to MyWot, Siteadvisor and Google safe browsing analytics, is quite a safe domain with no visitor reviews.
[4] The crown consists of two bundles (one right and one left) of featherlike tentacles known as branchiae, or radioles. Each of these bundles consists of a single row of radioles attached to a branchial stalk and curved into a semicircle. These two semicircles form the funnel-shaped branchial crown. The mouth is located at the apex of the funnel, between the two branchial stalks. [4] An adult worm typically has about 40 radioles in its crown, covered by tiny, hair-like branches called cilia. This arrangement gives the crown the appearance of a small fan or feather duster (for which the animals are often referred to as fanworms, or feather duster worms). When extended, these heavily ciliated radioles trap particles of organic matter and transport them towards the mouth. Use in filter feeding [ edit] The ventral surface of each radiole is covered by cilia that rhythmically move in such a way as to create a current in the surrounding water column. This current carries planktonic particles from the underside of the crown upwards through the net of radioles to the dorsal surface.
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