Help


[permalink] [id link]
+
Page "Frilled shark" ¶ 12
from Wikipedia
Edit
Promote Demote Fragment Fix

Some Related Sentences

dermal and denticles
Their tough skin is covered with dermal teeth ( again with Holocephali as an exception as the teeth are lost in adults, only kept on the clasping organ seen on the front of the male's head ), also called placoid scales or dermal denticles, making it feel like sandpaper.
In most species, all dermal denticles are oriented in one direction, making the skin feel very smooth if rubbed in one direction and very rough if rubbed in the other.
Another exception are the electric rays, which have a thick and flabby body, with soft, loose skin devoid of dermal denticles and thorns.
It is assumed that their oral teeth evolved from dermal denticles which migrated into the mouth, but it could be the other way around as the teleost bony fish Denticeps clupeoides has most of its head covered by dermal teeth ( as does, probably, Atherion elymus, another bony fish ).
Sharks have a covering of dermal denticles that protects their skin from damage and parasites in addition to improving their fluid dynamics.
A similar pattern emerged in a study in 2009 based on morphology, including color, dermal denticles and teeth: A smaller species, up to about in width, M. alfredi is found in the Indo-Pacific and tropical east Atlantic, and a larger, up to at least in width, M. birostris is found throughout tropical, subtropical and warm temperate oceans, but it has not yet been documented from most islands in the southwest Pacific.
The number and size of their dermal denticles are also reduced.
Most stingrays have one or more barbed stings ( modified from dermal denticles ) on the tail, which are used exclusively in self-defense.
Tooth enamel is also found in the dermal denticles of sharks.
# Placoid scales, also called dermal denticles, are similar to teeth in that they are made of dentin covered by enamel.
The silky shark's common name comes from the fine texture of its skin compared to other sharks, a product of its tiny, densely packed dermal denticles.
During the slight delay between closing the mouth and opening the gill flaps, plankton is trapped against the dermal denticles which line its gill plates and pharynx.
The body is thick and flabby, with soft, loose skin devoid of dermal denticles and thorns.
The fine graters are also sometimes sold as a wooden board covered with shark skin, which has many tiny teeth ( dermal denticles ) and give it a feel similar to sandpaper.
A material similar to dentin forms the hard material that makes up dermal denticles in sharks and other cartilaginous fish.
The dermal denticles are squarish and flattened, with a slight central concavity and raised corners.
The dermal denticles are small and overlapping, usually with 7 horizontal ridges, giving the skin a smooth feel.
The skin is covered with tiny dermal denticles that gives the fish a rough texture.
The skin is soft and covered by tiny, flattened dermal denticles ( scales ), lending a velvety texture.
It is characterized by a dense covering of thorn-like dermal denticles, hence its common name.
The skin has a dense, uniform covering of non-overlapping dermal denticles measuring up to across, which are never fused together as in the bramble shark.

dermal and are
Caecilians are unique among amphibians in having mineralized dermal scales embedded in the dermis between the furrows in the skin.
The head and pectoral girdles are covered with large dermal bones.
These are sometimes known as " epidermal ridges " which are caused by the underlying interface between the dermal papillae of the dermis and the interpapillary ( rete ) pegs of the epidermis.
The histopathologic characteristics that distinguish these tumors from other forms of neoplasia are a proliferation of both the epidermal and dermal skin layers.
Both types of dermal melanophores are important in physiological colour change.
The most recognizable features of Stegosaurus are its dermal plates, which consisted of 17 separate flat plates.
In primary cutaneous T-cell lymphoma, blood and dermal eosinophilia are often seen.
In Canada, there are scientists who claim that no hobo spider bites lead to dermal necrosis.
Some species also have dermal bones in the plastron, but these are not attached to the bones of the shell.
Cannulae are used in body piercing when using a standard IV needle ( usually between 18GA and 12GA, although may be as large as 0GA, in which case the procedure is known as dermal punching and uses a biopsy punch without a cannula ), and for inserting hooks for suspensions.
The mass of smooth muscle and glandular-duct tissue in the nipple and areola block the development of normal dermal nerve networks which are present in other erogenous regions and the development of special end organs.
Studies have been done to show that itch receptors are found only on the top two skin layers, the epidermis and the epidermal / dermal transition layers.
Dermal scutes are also found in a diverse number of extant mammals with conservative body types, such as in the tails of some rodents, sengis, moonrats, the opossums and other marsupials, and as regular dermal armour with underlying bone in the armadillo.
More particularly, they are primarily located in glabrous skin just beneath the epidermis within the dermal papillae.

dermal and small
Many extinct agnathans sported heavy dermal armour or small mineralized scales ( see below ).
* Papilla ( fish mouth structure ), small lumps of dermal tissue found in the mouth which hold taste buds
Uniquely among theropods, Ceratosaurus possessed dermal armor, in the form of small osteoderms running down the middle of its back.
The ground-sloth theory can provide an explanation for its supposed bulletproof hide, as preserved ancient skin samples in the late 19th century revealed hard dermal ossicles, small pieces of bone in the skin of dinosaurs and alligators that protected them from predators.

dermal and like
The pelycosaur scutes probably were nonoverlapping dermal structures with a horny overlay, like those found in modern crocodiles and turtles.
Myxedema ( BrE: myxoedema ) describes a specific form of cutaneous and dermal edema secondary to increased deposition of connective tissue components ( like glycosaminoglycans, hyaluronic acid, and other mucopolysaccharides ) in subcutaneous tissue as seen in various forms of hypothyroidism and Graves ' disease.
However, one of the side effects of the accident from the minute he was born was a extreme dermal sensitivity, making even the sensation of air on his skin feel like severe burns due to the over stimulation of neural cells in his skin.

0.121 seconds.