| 词汇 | haversian-canal |
| 释义 | Haversian canal noun[ C ] anatomy specialized(alsohaversian canal)uk /həˌvɜː.ʒən kəˈnæl/ us /həˌvɝː.ʒən kəˈnæl/ a small passage inside a bone that carries blood vessels and nerve fibres: Mammals have minute channels for blood vessels known as Haversian canals. At approximately four weeks after fixation, haversian canals proliferate along the longitudinal axis of the bone. A Haversian canal often contains two vessels, an artery and a vein, together with a small amount of connective tissue. The Haversian canals also send out smaller lateral vessels to provide nutrition to the nether regions of the bone. Each Haversian canal communicates either directly or indirectly with the marrow cavity of the bone. Bone structures acetabular acetabulum acromial acromioclavicular acromion foramen magnum frontal bone glenoid gnathic gynecoid osteophyte osteotomy parietal parietal bone pectoral girdle TMJ trapezoidal triquetrum true rib tubercle CompareHaversian system |
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