{"content":"10\n#色身工厂\n枕骨大孔\n颅底后区正中有一孔为枕骨大孔，脊髓上端在此与延髓相连。枕骨大孔形状不一，有双半环形、卵圆形、近似卵圆形、菱形等，中国人卵圆形者多见。","contentType":"application/json;utf-8","attachments":["metafile://beedf08bd5427d63aaf46855b19af728e4a475dfcd53c2eae1ef95ae9ba605f7i0.jpeg","metafile://052a3ae3d1762baa604a0890c74b105a383dbe18e2a45b3d51ebc6a56fb55271i0.jpeg","metafile://5f27317751bc455dfa66f0e135567c73402545c289f23b0711bad9a0a6849f92i0.png"]}