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试述骨组织的结构特点如何?

问答题
2022-06-29 17:53
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正确答案

骨组织由骨细胞、细胞间质组成。细胞间质包括有机物与无机物两种成分。前者主要是骨胶原纤维和少量的粘蛋白,后者主要为骨盐,骨盐与粘蛋白组成基质。胶原纤维被粘蛋白粘合,并有大量骨盐沉积,共同构成骨板。由骨板成层排列而成骨组织,在骨板之间或骨板内有小腔称骨陷窝。陷窝向周围发出许多骨小管与附近骨陷窝发出的骨小管通连。骨细胞的胞体位于骨陷窝内,突起伸入骨小管。骨组织有骨松质和骨密质两种。骨松质由相互重迭的骨板形成的骨小梁交叉成网,网眼内充满红骨髓;骨密质由骨板紧密排列而成,平行排列于骨表面的称外环骨板;围绕在骨髓腔周围的称内环骨板;围绕哈佛氏管作同心圆排列的称哈佛氏骨板;填充在哈佛氏骨板之间的称间骨板。


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