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人类而言，位于骨盆下方，共有两块。坐骨骨骼坚硬，分坐骨体和坐骨支两部分。坐骨体后端的骨突称作坐骨棘（与坐骨结节不同，坐骨结节在前部）。坐骨棘的后上方为坐骨大切迹。坐骨大切迹存在性别差异，女性坐骨大切迹宽而浅。
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