How To Use Spicule In A Sentence
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The dorsal conic spine-like structures could be a homology of cuticular spicules of polyplacophorans and aplacophorans.
Down with phyla! (episode II) - The Panda's Thumb
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The researchers rubbed roughly the same number of cowhage spicules the itch-inducing spiky bits of that plant, also known as velvet bean on three locations: the front of the ankle; on the underside of the forearm; and under the shoulder blade on the back.
A Dip in the Pool Does an Aging Body Good
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Also, the undersides of an osprey's feet are covered in spiny spicules which prevent fish from wriggling free.
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The spicules are some crutch-like, others spined or echinated, while the deep-sea sponges appear to grow long thick spicules, which attach the sponge to the ground by means of grapnel-like ends.
Scientific American Supplement, No. 601, July 9, 1887
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All rays of the outwardly placed spicules are well developed.
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G. cydonium spicules show equatorial spots up to the third order, which are consistent with a very regular hexagonal arrangement of protein units aligned along the spicule axis.
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Sponges have an internal skeleton composed of needle-like elements called spicules, which can be composed of calcium carbonate, opaline silica, or fibres of the scleroprotein spongin.
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The spicules are joined together and cemented by a body that has been named "spongin," which has much the same chemical composition as silk, and, like silk, is very elastic.
Scientific American Supplement, No. 601, July 9, 1887
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The spicules of bone revealed the characteristic corallike branching.
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The research solves an astrophysical puzzle that has baffled scientists for over 120 years since the spicules were first discovered.
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Dr. Ledenfeld again illustrated this stage of his lecture by means of a number of microscopic slides in which the variety of shape and size of these spicules and "spongin" fibers were shown.
Scientific American Supplement, No. 601, July 9, 1887
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The central point of the spicule positioned very close to the innermost shell wall.
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Just take it on faith that when applied to a human's skin, cowhage spicules reliably induce intense itching.
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Spicules are loosely interlocked to form a large and spiny subspherical shell.
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As markers of the membrane, this author used the spicules of a crenated red cell, a spot created by illumination of the membrane with a laser, or Heinz bodies.
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These families are characterized by dermal spicules that have distal excrescences or extra tangential rays, in the former, and with swollen distal rays on dermalia in the latter.
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Spicules first appeared 2 days after release from the parent and an osculum was first seen in 9-day old settled juveniles.
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The majority of the rays of the spicules are arranged radially and in a plane.
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Most living demosponges have skeletons of unfused spicules, although due to preservational effects, the fossil record of demosponges is mostly of fused forms.
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Some spicules are formed of the mineralized substances calcium carbonate and silica, while others are made of an organic substance called spongin.
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A general overview on the structural organization of the proteinaceous filament inside spicules is presented.
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Just in case you're not familiar with cowhage spicules, they are tiny threads taken from a tropical legume.
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Pillow lava and marine sponge spicules found in the contact zones between individual layers of the Columbia River Basalt suggest that these lava layers flowed out under water and that the water was ocean water, not freshwater from a lake.
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A few mineralized animal fossils, including sponge spicules and probable worm tubes, are known from the Vendian period immediately preceding the Cambrian.
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The spicules of bone, after alveolated parenchyma had been corroded off, revealed the characteristic coral-like branching and angulated bony spicules of DPO.
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The possibility of obtaining some structural information on the filaments inside the spicules can certainly give a more realistic picture of their organization.
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These spicules are up to 0.03 mm in diameter and taper to sharp tips.
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Thus, poriferan spicules and chancelloriid sclerites do not appear homologous.
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Hector noticed spicules of rime adorning the packing-case shelves like fluffy moulds and hoar on his own beard.
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The spicules are interlocked or joined to form the shell wall.
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If collar cells and spicules are defining characteristics of the Phylum Porifera, then nematocysts define cnidarians.
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Apart from the hissing of the pressure lamp, there was no sound inside the hut other than the metallic drumfire of the ice spicules against the icesheathed eastern wall of the hut.
Ice Station Zebra
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As the osteogenetic fibers grow out to the periphery they continue to calcify, and give rise to fresh bone spicules.
II. Osteology. 2. Bone
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Fossil sponges can be identified by the arrangement of their skeletons, which consist of collections of spicules with characteristic shapes and chemical constitutions.
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Sponge spicules are also an abundant constituent of the rhythmites.
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The tarpaulin that covers the entrance is gashed in several places, undoubtedly caused by the ice spicules flying at speeds that made them deadly projectiles.
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Tube walls have simple pores and are constructed of radiolarian and foraminiferan tests, sand grains and/or fragments of sponge spicules, connected by a cement of some kind.
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The sharp spots in the diffraction patterns shown in Fig.5 indicated that the protein units forming the central filaments inside the spicules must be organized with a very high degree of order.
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These spicules are up to 0.03 mm in diameter and taper to sharp tips.
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This skeleton consists of a four rayed, point-centered spicule.
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Test walls appear to lack compositional zonation, consisting mostly of small quartz grains with some incorporated sponge spicules.
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The dorsal conic spine-like structures could be a homology of cuticular spicules of polyplacophorans and aplacophorans.
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They have different kinds of cells—digestive cells, cells that secrete the spicules segments of the body skeleton of spongy proteinaceous material, and so on—which can communicate with one another and divide up the labor of life to work together as a single individual.
SuperCooperators
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One of these giant cells may be found lying in a Howships foveola at the free end of each spicule.
II. Osteology. 2. Bone
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Another factor that must be taken into account to interpret the different behavior of the various spicules is the morphology of the spicules investigated.
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However, in specimens in which the secondary rays are well developed, the spicular structure becomes complicated and the primary six-rayed spicule is difficult to discern.
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The "Type-II" spicules, which McIntosh and De Pontieu have recently dubbed "radices," are hotter, shorter lived and faster moving than their Type-I brethren.
Livescience.com
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Few long marginalia projecting from the oscular margin may belong to an oscular spicule rim.
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Recently spicules from sponges of the class Hexactinellida have been identified in Ediacaran age rocks.
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Hector noticed spicules of rime adorning the packing-case shelves like fluffy moulds and hoar on his own beard.
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Traces of siliceous spicules in the flint indicate that colonies of sponges populated the ancient seas in which the flint was deposited and were the source of silica for the flint beds.
