单词 | osteon |
释义 | osteonn. Histology. A basic structural unit of bone, consisting of one or more concentric layers of bone around a longitudinal vascular channel; = Haversian system n. at Haversian adj. 3 ΘΚΠ the world > life > the body > structural parts > bone or bones > substance of bones > [noun] > Haversian system Haversian system1845 osteon1928 the world > life > the body > structural parts > bone or bones > parts of bones > [noun] > opening or passage Haversian canal1838 fenestra1844 Haversian system1845 osteon1928 1928 S. Moore & J. A. Key tr. R. Leriche & A. Policard Normal & Pathol. Physiol. of Bone i. 24 Recently, several histologists have tried to make the Haversian systems the structural units of bone, and have given them the name of osteons. This neologism is useless. 1958 Jrnl. Bone & Joint Surg. 40A 419 Haversian systems or osteons course primarily longitudinally in the long bones. 1968 R. Passmore & J. S. Robson Compan. Med. Stud. I. xvi. 12/1 The osteones branch and interweave one with another. 1971 Nature 30 July 335/1 The osteons were orientated along the length of the femur, and tangentially to the surface of the frontal bone of the skull. 1980 Gray's Anat. (ed. 36) iii. 267/1 As the bone matures, typical Haversian systems (secondary osteons) gradually replace the primary osteons and woven-fibred bone. 2001 New Scientist 20 Jan. 4/1 Bone is made up of ‘osteons’ which contain layers of collagen fibres wrapped inside each other. This entry has been updated (OED Third Edition, September 2004; most recently modified version published online March 2022). < n.1928 |
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