WebMar 15, 2024 · Fish scales are the small, almost plastic, flakes that cover their body. Most fish have scales, but not all. Scales effect the fish’s life through their cost of manufacture, restrictions they impose on body … Web3- Sharks. Cartilaginous fish, such as the shark, are covered with placfoid scales. The placoid scales of these fish are structurally homologous with the vertebrate teeth. The shark is a fish characterized by a cartilaginous skeleton, it has 5 to 7 gills on the sides of the head and pectoral fins that are not attached to its head.

Look at fish scales under the microscope - My …

WebApr 1, 2024 · Noun [ edit] scale ( plural scales ) ( obsolete) A ladder; a series of steps; a means of ascending. An ordered, usually numerical sequence used for measurement, means of assigning a magnitude . Please rate your experience on a scale from 1 to 10. The magnitude of an earthquake is measured on the open-ended Richter scale. WebOct 30, 2024 · There are four types of fish scales: cosmoid, ganoid, placoid, and elasmoid. Elasmoid scales have two subtypes, ctenoid and cycloid scales. Fish scales primarily serve two purposes: protection and locomotion. What distinguishes these various scales from each other is both their composition and how they balance those two functions. The … dast scan full form

Fish scale - Inkipedia, the Splatoon wiki

Webfish-scale; Etymology . From fish +‎ scale, from its appearance as shiny yellowish flakes resembling the scales of a fish, as opposed to dull white powder. Noun . fishscale … A fish scale is a small rigid plate that grows out of the skin of a fish. The skin of most jawed fishes is covered with these protective scales, which can also provide effective camouflage through the use of reflection and colouration, as well as possible hydrodynamic advantages. The term scale derives from the Old … See more The bony scales of thelodonts, the most abundant form of fossil fish, are well understood. The scales were formed and shed throughout the organisms' lifetimes, and quickly separated after their death. Bone, a tissue that … See more Elasmoid scales are thin, imbricated scales composed of a layer of dense, lamellar collagen bone called isopedine, above which is a layer of … See more Leptoid (bony-ridge) scales are found on higher-order bony fish, the teleosts (the more derived clade of ray-finned fishes). The outer part of these scales fan out with bony ridges while the inner part is criss-crossed with fibrous connective tissue. Leptoid scales are … See more Scutes are similar to scales and serve the same function. Unlike the scales of fish, which are formed from the epidermis, scutes are formed in the lower vascular layer of the skin and the epidermal element is only the top surface. Forming in the living dermis, … See more Cosmoid scales are found only on ancient lobe-finned fishes, including some of the earliest lungfishes (subclass Dipnoi), and in Crossopterygii, including the living coelacanth in a modified form (see elasmoid scales, below). They were probably derived … See more Ganoid scales are found in the sturgeons, paddlefishes, gars, bowfin, and bichirs. They are derived from cosmoid scales and often have serrated edges. They are covered with a layer of hard enamel-like dentine in the place of cosmine, and a layer of inorganic bone … See more Placoid (pointed, tooth-shaped) scales are found in the cartilaginous fishes: sharks, rays. They are also called dermal denticles. Placoid scales are structurally homologous See more Web2 Answers. No, fish scales are dermal (= formed in derma) bones like skull roof bones. Scales in reptiles are formed by epidermis and are made primarily of protein (from keratinocytes ), being similar in derivation to hair, feather and nails. On the other hand, in reptiles one must differentiate between scales and osteoderms (= scutes). bitfenix prodigy mini-itx orange