LCN 存在于骨单位（osteons）内，由中央的哈弗斯管（Haversian canal）、周围的骨陷窝（lacunae）以及连接它们的骨小管（canaliculi）组成。骨陷窝中住着骨细胞，它们如同城市里的居民，而骨小管则是连接各个 “居民点” 的道路，营养物质和信号分子通过骨小管内的 ...

The clinical challenge of bone defects in the craniomaxillofacial region, which can lead to significant physiological dysfunction and psychological distress, persists due to the complex and unique ...

它们汇聚到软骨下密质骨，融入 Haversian 系统，为关节软骨提供血液。同时，在股骨头的皮质下、皮质和软骨下区域都有丰富的毛细血管网络，这些毛细血管直径很小，能穿透软骨下骨到达关节软骨底部，为软骨提供营养。 组织形态计量分析：研究人员对各项 ...

Powered flight has evolved separately in three tetrapod clades: pterosaurs, birds (avian dinosaurs), and bats. To meet the challenges of powered flight, tetrapods acquired structural, mechanical, and ...