| 单词 | denticle |
| 例句 | The denticles decreased drag and made the shark able to swim quickly and quietly. The Line Tender 2019-04-16T00:00:00Z I wanted to reach out and touch its back, which was covered in denticles, V-shaped scales that were like teeth all over the shark’s body. The Line Tender 2019-04-16T00:00:00Z But the suction cups wouldn’t stick to the rays’ mucus-covered dermal denticles—tooth-like scales that cover the bodies of sharks and rays. Watch a manta ray courtship 'train'—the deepest ever filmed 2023-10-23T04:00:00Z They analyzed the fossils’ rostral denticles, the spikes that jut from the sides of a sawfish’s snout to aid in foraging and self-defense. Ancient Sawfish Help to Illuminate Our Teeth’s Scaly Origins 2022-12-02T05:00:00Z But as the structure—and roughness—of dermal denticles varies around a shark’s body, it may also be a better place to scratch. Watch itchy fish rub up against the worst possible scratching post: hungry sharks 2021-11-09T05:00:00Z These scales are microscopic — each one is only about the width of a human hair — but sharks slough off about 100 denticles for each tooth they lose, making them common in the fossil record. Sharks Almost Went the Way of the Dinosaurs 19 Million Years Ago 2021-06-03T04:00:00Z After two months, an electron-microscope analysis revealed that the concentrations of calcium and phosphate in the sharks’ denticles were significantly reduced. Ocean Acidification Could Eat Away at Sharks’ Teeth and Scales 2019-12-19T05:00:00Z This may have been because reef mantas have smaller dermal denticles and so there was less friction to keep the cups in place. Watch a manta ray courtship 'train'—the deepest ever filmed 2023-10-23T04:00:00Z Shark skin is weird, plated in toothlike scales called denticles. How Sharks Glow to Each Other Deep in the Ocean 2019-08-08T04:00:00Z The mako’s scales, called denticles, are translucent, flexible and shaped like tiny shark teeth. Shark skin studied by US military to make faster, more agile aircraft 2019-03-05T05:00:00Z Together, they developed a framework to identify distinct groups of denticles. Sharks Almost Went the Way of the Dinosaurs 19 Million Years Ago 2021-06-03T04:00:00Z Shark skin is covered with denticles: tiny tooth-like spikes that help to reduce drag as the shark swims. Black holes, shark skin and cockatoo tools — November’s best science images 2018-11-29T05:00:00Z Long ago, carnivorous dinosaurs grew little serrations on the back of their teeth called denticles, all the better to eat prey with. Scratches on dinosaur teeth reveal their fierce, efficient eating habits 2018-04-27T04:00:00Z The skin of sharks is lined with denticles, or small, tooth-like scales. These Tiny Scales Make Sharks Incredibly Fast. Can They Help Us Build Better Planes? 2018-02-07T05:00:00Z Like all sharks, these fish also have small, v-shaped scales called dermal denticles, which makes their skin tough and helps them swim away quickly and quietly. 'Alien'-Like Sharks With Extendable Jaws Pulled From Deep Sea 2018-01-11T05:00:00Z The researchers settled on 19 denticle traits — such as their shape and the orientation of their ridges. Sharks Almost Went the Way of the Dinosaurs 19 Million Years Ago 2021-06-03T04:00:00Z The fact teeth and sharks' denticle scales both arise from the same kind of embryonic cell suggests a common evolutionary origin, the team reported in the journal Proceedings of the National Academy of Sciences. Human teeth origin 'link to fish scales' 2017-11-20T05:00:00Z As the dinosaurs bit down, their food scraped into the denticles. Scratches on dinosaur teeth reveal their fierce, efficient eating habits 2018-04-27T04:00:00Z The researchers wanted to see how denticles on sharkskin made the fishes faster and teamed up with their colleagues at the University of South Carolina to look into it. These Tiny Scales Make Sharks Incredibly Fast. Can They Help Us Build Better Planes? 2018-02-07T05:00:00Z Tiny, flat v-shaped scales called dermal denticles help sharks swim quickly and quietly. Why an 8-Foot Great White Shark Leapt Onto a Fishing Boat Of the 88 denticle groups initially present before 19 million years ago, only nine persisted afterward. Sharks Almost Went the Way of the Dinosaurs 19 Million Years Ago 2021-06-03T04:00:00Z During early evolution of jawed vertebrates, dermal denticles were transferred from the skins of primitive fish to their mouth. Human teeth origin 'link to fish scales' 2017-11-20T05:00:00Z For one, it doesn’t seem like there are enough denticles to create the kind of turbulence you’d need for a superhydrophobic surface. Natural Lube Powers One of World's Fastest Fish Through several lab tests, they found that shark denticles not only reduce drag to help propel the animals forward, but they also increase lift. These Tiny Scales Make Sharks Incredibly Fast. Can They Help Us Build Better Planes? 2018-02-07T05:00:00Z One of the grooves is particularly telling because it contains tiny channels left by tooth serrations called denticles. Tyrannosaurs were probably cannibals 2015-10-29T04:00:00Z Similar to the skin denticles from which they are derived, saw teeth develop by filling in open spaces created as the snout grows. Sawfish ‘teeth’ didn’t pave the way for modern chompers 2015-09-01T04:00:00Z "We show that... the denticle scales of sharks and skate develop from neural crest cells, just like teeth." Human teeth origin 'link to fish scales' 2017-11-20T05:00:00Z Sharkskin is as rough as high grain sandpaper thanks to millions of small toothlike scales called denticles. ScienceShot: Swimming With Sharkskin 2014-05-14T04:00:00Z They tested 20 different configurations, switching up the size of the denticles, the rows they were arranged in, and the positions of those rows. These Tiny Scales Make Sharks Incredibly Fast. Can They Help Us Build Better Planes? 2018-02-07T05:00:00Z Viewed up close, a shark's skin bristles with tiny teeth or "denticles" which aid swimming. 3D printing used to model shark skin 2014-05-14T04:00:00Z The differences add to the body of evidence suggesting dermal denticles are unrelated to present-day molars, the team reports online today in Royal Society Open Science. Sawfish ‘teeth’ didn’t pave the way for modern chompers 2015-09-01T04:00:00Z Small, tooth-like protrusions on the bill, called denticles, seem to help with this. Speedy Fish's Sword-Like Bill Serves as a Multifunctional Killing Tool 2014-04-24T18:00:00Z Using a 3D printer, the team studded thousands of identical 2-millimeter denticles onto both sides of a flexible foil, as pictured above. ScienceShot: Swimming With Sharkskin 2014-05-14T04:00:00Z They found that shark denticles not only reduce drag, but they also increase lift. These Tiny Scales Make Sharks Incredibly Fast. Can They Help Us Build Better Planes? 2018-02-07T05:00:00Z George Lauder and his colleagues took a detailed scan of a tiny square of skin from a mako shark, and built a 3D model of a single denticle just 0.15mm long. 3D printing used to model shark skin 2014-05-14T04:00:00Z In contrast, cartilaginous fishes produce extensive dermal bone such as teeth, dermal denticle and fin spine. Elephant shark genome provides unique insights into gnathostome evolution 2014-01-08T18:21:42.027Z Called Fastskin and introduced in 2000 for the Sydney Olympics, the suit was studded with tiny hydrofoils with V-shaped ridges like the "dermal denticles" on sharkskin. Swimsuits that turn athletes into barracudas 2012-07-17T16:45:22Z Intact denticles produced swirls close to the skin, the researchers report in The Journal of Experimental Biology, creating low pressure areas that pulled the fin forward. Video: Scales Give Sharks Their Speed 2012-02-09T20:12:00Z This will bring the denticle near the letter C, and the first point of Aries near X, which means 9 a.m.” Astronomical Lore in Chaucer 2011-10-13T02:00:42.860Z The artificial denticles also allowed the paddle to travel the same simulated distance while using 5.9% less energy. 3D printing used to model shark skin 2014-05-14T04:00:00Z In contrast, cartilaginous fishes produce extensive dermal bone such as teeth, dermal denticle and fin spine. Elephant shark genome provides unique insights into gnathostome evolution 2014-01-08T18:21:42.027Z Shark skin is armored with tiny teeth called denticles that reduce friction by forcing water to flow in channels. Books on Science: ?Demon Fish? Book Review - Why Vanishing Sharks Deserve Our Attention 2011-09-05T18:12:49Z The buccal region presents a pair of shelly jaws placed laterally upon the lips, and a wide range of variation in the form of the denticles of the lingual ribbon or radula. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 5 "Gassendi, Pierre" to "Geocentric" 2011-09-02T02:00:20.450Z In some tailed amphibians the vomers and splenials are known to arise by the fusion of small denticles. Text Book of Biology, Part 1: Vertebrata The challenge was then to manufacture a synthetic skin, with thousands of these denticles embedded in a smooth, flexible membrane. 3D printing used to model shark skin 2014-05-14T04:00:00Z Cells much elongated, narrow; sides parallel, ends square; an upturned spine on each side at the oral end; sides of cell denticulate, denticles very numerous, small, acute. Narrative of the Voyage of H.M.S. Rattlesnake, Commanded By the Late Captain Owen Stanley, R.N., F.R.S. Etc. During the Years 1846-1850. Including Discoveries and Surveys in New Guinea, the Louisiade Archipelago, Etc. to Which Is Added the Account of Mr. E.B. Kennedy's Expedition for the Exploration of the Cape York Peninsula. By John Macgillivray, F.R.G.S. Naturalist to the Expedition. — Volume 1 Because the resolution of even the latest 3D printers is limited, the artificial denticles are about 10 times larger than the real ones seen on the skin of a mako shark. 3D printing used to model shark skin 2014-05-14T04:00:00Z Like other Euthyneura, they have very numerous small denticles on the lingual ribbon. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 5 "Gassendi, Pierre" to "Geocentric" 2011-09-02T02:00:20.450Z The mouth is rough with denticles, and has a fleshy immovable tongue on its floor. Text Book of Biology, Part 1: Vertebrata |
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