Synonyms: Haversian system , osteone. Wiktionary 0. How to pronounce osteon? Alex US English. Daniel British.
Journal of Vertebrate Paleontology. Learn how and when to remove these template messages. Acta Vet Latin word osteon. Join YourDictionary today. This article includes a list of referencesbut its sources remain unclear because it has insufficient inline citations. Unsourced Black gals may be challenged and removed. How to pronounce osteon? Diagram of compact bone from a transverse section of a long bone's cortex. Ossification Primary bone intramembranous endochondral. An osteon can "drift" in one direction or change directions several times, leaving a Latin word osteon of lamellae behind the advancing haversian canal.
Dominating shemale. endosteum - Medical Definition
Osteons are roughly cylindrical structures that are typically several millimeters long and around 0.
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Osteons are roughly cylindrical structures that are typically several millimeters long and around 0. Each osteon consists of concentric layers, or lamellae , of compact bone tissue that surround a central canal, the haversian canal. The haversian canal contains the bone's blood supplies. The boundary of an osteon is the cement line.
Each haversian canal is surrounded by varying number of concentrically arranged lamellae of bone matrix. Near the surface of the compact bone, the lamellae are arranged parallel to the surface; these are called circumferential lamellae.
Some of the osteoblasts develop into osteocytes , each living within its own small space, or lacuna. This network facilitates the exchange of nutrients and metabolic waste. Collagen fibers in a particular lamella run parallel to each other, but the orientation of collagen fibers within other lamellae is oblique.
The collagen fiber density is lowest at the seams between lamellae, accounting for the distinctive microscopic appearance of a transverse section of osteons. The space between osteons is occupied by interstitial lamellae , which are the remnants of osteons that were partially resorbed during the process of bone remodeling. Osteons are connected to each other and the periosteum by oblique channels called Volkmann's canals or perforating canals.
Drifting osteons are a phenomenon that is not fully understood. A "drifting osteon" is classified as one that runs both longitudinally as well as transversely through the cortex. An osteon can "drift" in one direction or change directions several times, leaving a tail of lamellae behind the advancing haversian canal. In bioarchaeological research and in forensic investigations, osteons in a bone fragment can be used to determine the sex of an individual  and age, as well as aspects of taxonomy, diet, health and motor history.
Osteons and their arrangement vary according to taxon, so that genus and sometimes species can be differentiated using a bone fragment not otherwise identifiable. However, there is considerable variability among the different bones of a skeleton, and features of some faunal osteons overlap with those of human osteons; therefore, examination of osteons is not of primary use in the analyses of osteological remains.
In recent decades, osteohistological studies of dinosaur fossils have been used to address a number of issues, such as the periodicity of growth of dinosaurs and whether it was uniform across species  and the question of whether dinosaurs were warm-blooded or not. From Wikipedia, the free encyclopedia. This article has multiple issues. Please help improve it or discuss these issues on the talk page.
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Journal of Vertebrate Paleontology. Geological Magazine. Bone and cartilage. Primary bone intramembranous endochondral. Osteon Haversian canals Volkmann's canals connective tissue endosteum periosteum Sharpey's fibres enthesis lacunae canaliculi trabeculae medullary cavity bone marrow. Categories : Skeletal system. Hidden categories: Articles needing additional references from December All articles needing additional references Articles lacking in-text citations from December All articles lacking in-text citations Articles with multiple maintenance issues All articles with dead external links Articles with dead external links from September Namespaces Article Talk.
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Latin word osteon. by Dr. M. A. (Toby) Arnold
Osteon - Wikipedia
Synonyms: Haversian system , osteone. Wiktionary 0. How to pronounce osteon? Alex US English. Daniel British. Karen Australian. Veena Indian. How to say osteon in sign language? Select another language:. Powered by CITE.
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