容纳骨细胞的小腔,含有组织液:()。|容纳骨细胞突起的,与骨陷窝通连,含有组织液:()。|骨单位中央的纵行管道,其内有细血管和神经:()。 A. 骨陷窝 B. 骨 C. 中央管 D. 松质管 E. 密质管
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