what is chondrichthyes
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- Medical Definition of Chondrichthyes. : a class comprising cartilaginous fishes with well-developed jaws and including the sharks, skates, rays, chimeras, and extinct related forms—compare cyclostomata.
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Goldenhar syndrome Goldenhar syndrome (also known as Oculo-Auriculo-Vertebral (OAV) syndrome) is a rare congenital defect characterized by incomplete development of the ear, nose, soft palate, lip, and mandible.oldenhar syndrome (also known as Oculo-Auriculo-Vertebral (OAV) syndrome) is a rare congenital defect characterized by incomplete development of the ear, nose, soft palate, lip, and mandible.
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"Combo with ""Geology 102 Chap 12 and 13""" By Laura Klappenbach. Bony fishes (Osteichthyes) are a group of aquatic vertebrates characterized by having a bony skeleton (in contrast to the cartilaginous fishes, a group whose skeleton consists of cartilage, not bone).Bony fishes include two sub groups, the ray-finned fishes and the lobe-finned fishes.y Laura Klappenbach. Bony fishes (Osteichthyes) are a group of aquatic vertebrates characterized by having a bony skeleton (in contrast to the cartilaginous fishes, a group whose skeleton consists of cartilage, not bone).
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- Sharks and the dogfish Biologically, sharks are fish belonging to the phylum Chordata and the subphylum Vertebrata. However, sharks and their relatives, the rays and skates, are unique amongst fish in that their skeletons are made entirely of cartilage, not bone.harks and the dogfish Biologically, sharks are fish belonging to the phylum Chordata and the subphylum Vertebrata. However, sharks and their relatives, the rays and skates, are unique amongst fish in that their skeletons are made entirely of cartilage, not bone.
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- Chondrites are stony (non-metallic) meteorites that have not been modified due to melting or differentiation of the parent body. They are formed when various types of dust and small grains that were present in the early solar system accreted to form primitive asteroids.
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The compounds of the vertebrae The compound of articular processes of vertebrae called dugootrostchatym compound (articulatio zygapophysialis). The joint is flat, formed articular surfaces of the upper articular processes of one vertebra and articular surfaces of the lower articular processes of another-the overlying-vertebra.
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Cartilage Chondrification (also known as chondrogenesis) is the process by which cartilage is formed from condensed mesenchyme tissue, which differentiates into chondroblasts and begins secreting the molecules (aggrecan and collagen type II) that form the extracellular matrix.
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Where are Chondrocytes? Skeleton gives our body the frame work and strength and the Cartilage is what provides us with flexibility and elasticity. Chondrocytes are an inseparable part of the cartilage connective tissue and is encircled by the intracellular extensive matrix.n such cases, cellular process of Autologous chondrocyte implantation is known to encourage the cartilage growth. Being metabolic power plants of the cartilage, the chondrocytes produce intercellular matrix constantly.
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Osteichthyes Osteichthyes /ˌɒstiːˈɪkθi.iːz/ , also called bony fish, are a taxonomic group of fish that have bone, as opposed to cartilaginous, skeletons.The vast majority of fish are osteichthyes, which is an extremely diverse and abundant group consisting of 45 orders, and over 435 families and 28,000 species.It is the largest class of vertebrates in existence today.Osteichthyes are divided into the ray-finned fish (Actinopterygii) and lobe-finned fish (Sarcopterygii).The oldest known fossils of bony fish are about 420 million years ago, which are also transitional fossils, showing a tooth pattern that is in between the tooth rows of sharks and bony fishes.t is the largest class of vertebrates in existence today. Osteichthyes are divided into the ray-finned fish (Actinopterygii) and lobe-finned fish (Sarcopterygii).
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Osteichthyes Osteichthyes /ˌɒstiːˈɪkθi.iːz/ , also called bony fish, are a taxonomic group of fish that have bone, as opposed to cartilaginous, skeletons. The vast majority of fish are osteichthyes, which is an extremely diverse and abundant group consisting of 45 orders, and over 435 families and 28,000 species.The lungs of amphibians, reptiles, birds, and mammals were inherited from their bony fish ancestors.) They do not have fin spines, but instead support the fin with lepidotrichia (bone fin rays). They also have an operculum, which helps them breathe without having to swim. Bony fish have no placoid scales.
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Osteochondritis Dissecans (OCD) in Dogs Osteochondrosis is a pathological condition in which normal endochondral ossification, the metamorphoses of cartilage to bone, is disturbed. The disturbance is often due to a disruption in the blood supply to the bone. The result is retention of excessive cartilage at the site as the process of endochondral ossification is halted, but cartilage continues to grow.
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- Craniata (sometimes Craniota) is a proposed clade of chordate animals that contains the Myxini (hagfish), Petromyzontida (including lampreys), and Gnathostomata (jawed vertebrates) as living representatives. As the name suggests, Craniata are animals with a (hard bone or cartilage) skull in Chordata.n the simplest sense, craniates are chordates with heads, thus excluding members of the chordate subphyla Urochordata (tunicates) and Cephalochordata (lancelets), but including Myxini, which have cartilaginous skulls and tooth-like structures composed of keratin.
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- 1 Chondrites - (kon-drites) meteorites which contain chondrules. Chondrules are minerals which formed small spheres while floating around in space. 2  Achondrites - (a-kon-drites) meteorites which do not contain chondrules. Many of these specimens originate from larger 'parent bodies' such as the Moon, Mars or an asteroid.
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Hadrosaurid Hadrosaurids (Greek: ἁδρός, hadrós, stout, thick), or duck-billed dinosaurs, are members of the ornithischian family Hadrosauridae. This group is also known as the duck-billed dinosaurs, for the flat, duck-bill appearance of their mouths. The family, which includes ornithopods such as Edmontosaurus and Parasaurolophus, was a common herbivore in the Upper Cretaceous Period of what is now Asia, Europe, Antarctica, South America and North America.
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Clinical Cases Osteophytosis Osteophytosis. Osteophytes, more commonly known as bone spurs, are outgrowths of bone tissue that form around damaged joints. This bone growth is thought to be a compensatory response to bone and ligament damage, and is meant to restrict movement of the joint to protect from further damage.steophytes, more commonly known as bone spurs, are outgrowths of bone tissue that form around damaged joints. This bone growth is thought to be a compensatory response to bone and ligament damage, and is meant to restrict movement of the joint to protect from further damage.
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Ichthyology Ichthyology (from Greek: ἰχθύς, ikhthus, fish; and λόγος, logos, study), also known as fish science, is the branch of zoology devoted to the study of fish. This includes bony fish (Osteichthyes), cartilaginous fish (Chondrichthyes), and jawless fish (Agnatha).
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- THE VERTEBRATES Chordates (phylum Chordata) are deuterostome coelomates whose nearest relatives in the animal kingdom are the echinoderms, the only other deuterostomes. However, unlike echinoderms, chordates are characterized by a notochord, jointed appendages, and segmentation.
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Cartilaginous Fish The cartilaginous fish, or Chondricthyes, include the sharks, rays, skates, and chimaeras. There are over eight hundred living species of sharks and rays, and about thirty species of chimaeras.Cartilaginous fish are true fish. They have fins and breathe with gills.harks, rays, and chimaeras or ratfishes make up the cartilaginous fishes (Chondrichthyes), one of the two major groups of fishes. The other major group is the ray-finned fishes (Actinopterygii). Unlike the more familiar rayfinned fishes, the cartilaginous fishes have skeletons composed entirely of cartilage.
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- Key features of Chondrichthyes. 1  Resemble bony fish and terrestrial vertebrates in having jaws, paired appendages, visceral arches located deeply next to the pharynx, an inner ear with three semicircular canals, and paired nasal cavities.2  An electroreceptive system is well developed.3  Skin with placoid scales and mucous glands; teeth of modified ... Resemble bony fish and terrestrial vertebrates in having jaws, paired appendages, visceral arches located deeply next to the pharynx, an inner ear with three semicircular canals, and paired nasal cavities. 2  An electroreceptive system is well developed.
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Appendicular skeleton From Wikipedia, the free encyclopedia. The appendicular skeleton is the portion of the skeleton of vertebrates consisting of the bones or cartilage that support the appendages. Appendages appeared as fins in early fishes, and subsequently evolved into the limbs of tetrapods.rom Wikipedia, the free encyclopedia. The appendicular skeleton is the portion of the skeleton of vertebrates consisting of the bones or cartilage that support the appendages. Appendages appeared as fins in early fishes, and subsequently evolved into the limbs of tetrapods.
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Osteichthyes The vertebrates include various animal groups such as fish, amphibians, reptiles, birds, and mammals. A fish pertains to any gill-bearing animals lacking limbs with digits. Osteichthyes (bony fish) is one of the taxonomic superclasses of fish. The others are chondrichthyes (cartilaginous fish) and Agnatha (jawless fish). Osteichthyes includes the ray-finned fish (Actinopterygii) and lobe-finned fish (Sarcopterygii).
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Chondrichthyes Chondrichthyes (/kɒnˈdrɪkθɨ.iːz/ ; from Greek χονδρ- chondr- 'cartilage', ἰχθύς ichthys 'fish') is a class that contains the cartilaginous fishes: they are jawed vertebrates with paired fins, paired nares, scales, a heart with its chambers in series, and skeletons made of cartilage rather than bone.he class Chondrichthyes has two subclasses: the subclass Elasmobranchii (sharks, rays, skates, and sawfish) and the subclass Holocephali (chimaeras). To see the full list of the species, click here.
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- Chondrichthyes share many common characteristics among each other; their main defining feature is having a cartilaginous skeleton. Other features found in Chondricthyes include similar coloration patterns, placoid scales, pectoral fins, and ampullae of lorenzini.
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- Three of the vertebrate classes are fish. The most primitive of these is Agnatha. It consists of jawless fish that do not have scales. These are the lampreys and hagfish.Fish that have skeletons consisting of hard rubber-like cartilage rather than bone are members of the class Chondrichthyes.he most primitive of these is Agnatha. It consists of jawless fish that do not have scales. These are the lampreys and hagfish. Fish that have skeletons consisting of hard rubber-like cartilage rather than bone are members of the class Chondrichthyes. These are the sharks and rays.
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- a combining form meaning “cartilage,” used in the formation of compound words: chondriosome. Also, chondro-; especially before a vowel, chondr-. Origin of chondrio-. Greek.
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- • a post-anal tail (in most other animals with a complete digestive tract, the anus is the posterior-most point of the body). The post-anal tail allowed for swimming in ancestral chordates. Class Chondrichthyes–Cartilaginous Fish (Photo atlas, p. 189-194) This was the first group of vertebrates to evolve jaws and paired appendages (e.g., fins). Vertebrate jaws evolved from skeletal supports of the pharyngeal slits. These two adaptations allowed for a greater capacity for movement, as well as the exploitation of new food resources. As the name implies, cartilaginous fish have a skeleton made out of