Methods Thirty-five slices grinding from human being as well as dog, pig, cow and sheep bones were observed to compare their structure, then were analysed with the researchful microscope.

• 方法制作人与狗、猪、牛、羊长骨中段横切磨片35张，光镜下观察比较哈氏系统，并在研究型显微镜下进行图像分析。