| 词汇 | haversian-system |
| 释义 | Haversian system noun[ C ] anatomy specialized(alsohaversian system)uk /həˌvɜː.ʒən ˈsɪs.təm/ us /həˌvɝː.ʒən ˈsɪs.təm/ a small passage inside a bone that carries blood vessels and nerve fibres, and the layer of bone that surrounds it : The whole of the bone is permeated by a system of blood vessels running through the bony canals in the centres of the Haversian systems. Concentric lamellar bone is bone forming parts of the haversian system, with haversian canals in the centre. The Haversian canals can be seen in a transverse section of bone as round holes at or about the centre of each Haversian system. Both the internal and external parts of bone contain nutrient vessels passing to all parts of each Haversian system. 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 canal |
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