| Test walls appear to lack compositional zonation, consisting mostly of small quartz grains with some incorporated sponge spicules. |
|
| The dorsal conic spine-like structures could be a homology of cuticular spicules of polyplacophorans and aplacophorans. |
|
| Also, the undersides of an osprey's feet are covered in spiny spicules which prevent fish from wriggling free. |
|
| A general overview on the structural organization of the proteinaceous filament inside spicules is presented. |
|
| The research solves an astrophysical puzzle that has baffled scientists for over 120 years since the spicules were first discovered. |
|
| The majority of the rays of the spicules are arranged radially and in a plane. |
|
| If collar cells and spicules are defining characteristics of the Phylum Porifera, then nematocysts define cnidarians. |
|
| Recently spicules from sponges of the class Hexactinellida have been identified in Ediacaran age rocks. |
|
| Brittle stars also have pluteus larvae with skeletal spicules that resemble those of the urchin. |
|
| Thus, poriferan spicules and chancelloriid sclerites do not appear homologous. |
|
| Some spicules are formed of the mineralized substances calcium carbonate and silica, while others are made of an organic substance called spongin. |
|
| The spicules are interlocked or joined to form the shell wall. |
|
| 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. |
|
| Its separation from other species of the 'xylophilus' group is mainly based on female tail shape, spicules size and the mucro length. |
|
| The fetal tissue should not be removed forcibly through the cervix, as bone spicules may lacerate the cervix. |
|
| These spicules are up to 0.03 mm in diameter and taper to sharp tips. |
|
| To kill and handle prey, Bald Eagles have massive beaks, large talons, and oversized feet equipped with small spikes, called spicules. |
|
| A few fragments of the spicules of sponges and a few frustules of diatoms may be present. |
|
| It's walls are less than 2mm thick and it is very brittle as a result of only two layers of fused hexactin spicules. |
|
| Scientific evidence has demonstrated that contamination of such crops by bone spicules present in the soil cannot be avoided. |
|
|
|
| Different groups of sponges make their spicules that form the sponge's skeleton out of different materials. |
|
| The sponges that build the reefs are members of a special group of glass sponges that have a complex skeleton made of fused glass spicules. |
|
| These spicules are also known as frazil ice and give the sea surface an oily appearance. |
|
| The first visual indication of ice formation is the appearance of spicules or plates of ice in the top few centimetres of water. |
|
| This latter species is very close to Psychropotes semperiana but differs in its transparency and the characteristics of its spicules. |
|
| Living beings formed of one or more cells, some of which possess a skeleton formed of calcareous spicules. |
|
| Fossil sponges can be identified by the arrangement of their skeletons, which consist of collections of spicules with characteristic shapes and chemical constitutions. |
|
| All rays of the outwardly placed spicules are well developed. |
|
| A few mineralized animal fossils, including sponge spicules and probable worm tubes, are known from the Vendian period immediately preceding the Cambrian. |
|
| Most living demosponges have skeletons of unfused spicules, although due to preservational effects, the fossil record of demosponges is mostly of fused forms. |
|
| 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. |
|
| The spicules of bone revealed the characteristic corallike branching. |
|
| The possibility of obtaining some structural information on the filaments inside the spicules can certainly give a more realistic picture of their organization. |
|
| Sponge spicules are also an abundant constituent of the rhythmites. |
|
| Another factor that must be taken into account to interpret the different behavior of the various spicules is the morphology of the spicules investigated. |
|
| At the network edges, clusters of spicules project from the clumps of magnetic field lines. |
|
| Minute internal spicules may be jammed together to form a skeletal axis, as in the red coral. |
|
| In the areas of prominences the magnetic field lines are horizontal and spicules are absent. |
|
| The most prominent structures in the chromosphere, especially in the limb, are the clusters of jets, or streams, of plasma called spicules. |
|
| The body wall is made stronger by a skeleton of inorganic spicules and hollow cells called porocytes that open to draw water through the porocytes into the atrium which is pushed out a main osculum. |
|
|
|
| About 100,000 spicules are active on the Sun's surface at any given time. |
|
| Sponges are among the oldest known multicellular animals, sponge spicules have been found in Precambrian rock layers more than 600 million years old. |
|
| There is bone necrosis or loss of bone which can lead to loose teeth, sharp edges of exposed bone, bone spurs, and the breaking loose of small bone spicules or dead bone. |
|
| Males have ventrally curved, anteriorly expanded spicules. |
|
| In its interior, bony tissue is arranged in a network of intersecting plates and spicules called trabeculae, which vary in amount in different bones and enclose spaces filled with blood vessels and marrow. |
|
| Almost all shelly and calcareous organisms and those with spicules, such as sponges and sea cucumbers, provide fragments that wash into or fall into the gaps between corals. |
|
| It seems to be a suprabenthic detritus feeder on the basis of the contents of its digestive tract, which include the tests of Foraminifera, spicules of sponges and holothurians, as well as other detritus of benthic origin. |
|
| It is probably derived from sponge spicules or other siliceous organisms as water is expelled upwards during compaction. |
|
| It has been demonstrated that environmental contamination during harvesting of feed materials of plant origin by for example bone spicules cannot be avoided. |
|
| That improvement in laboratory performance has resulted in the detection of the adventitious presence of bone spicules, particularly in tuber and root crops. |
|
| A male that reinitiates the mating program, only to intromit his spicules into the same partner, is at a competitive disadvantage to disseminate his genetic material. |
|
| Small ostracods, sponge spicules, agglutinated foraminifers, gastropods, bivalves, brachiopods, fragments of conularids and bryozoans occur in the residues. |
|
| The ciborium usually has no teeth and can have only tiny spicules. |
|
| The pathology report revealed normal bone spicules containing fibrous connective tissue and granulation tissue with lymphocytes and multinucleate giant cells. |
|
| If primary biogenic sources such as spicules and radiolarians existed, the biological elements have been obliterated by dolomitization and other processes. |
|
| In fact, Clavigula is very similar to Glochidorella, differing from this mainly in the absence of perioral disc, shape of pharyngeal bulb and more robust spicules. |
|
| Spicules first appeared 2 days after release from the parent and an osculum was first seen in 9-day old settled juveniles. |
|
| Spicules are loosely interlocked to form a large and spiny subspherical shell. |
|
| Spicules of hexactinellids are nearly indistinguishable from those of demosponges in most measured characteristics. |
|
