如图所示,哺乳动物机体中位于小肠绒毛基部的上皮细胞(a)可不断增殖、分化形成吸收细胞(b),然后�上迁移,补充小肠绒毛顶端凋亡的细胞(c Template


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tomski如图所示,哺乳动物机体中位于小肠绒毛基部的上皮细胞(a)可不断增殖、分化形成吸收细胞(b),然后�上迁移,补充小肠绒毛顶端凋亡的细胞(c coloring