...（fetal lobule）：一个次级绒毛干及其分支形成 一个胎儿小叶，一个胎儿叶包含几个胎儿小叶，共200个 游离绒毛（free villus）：绒毛末端悬浮于绒毛间隙 固定绒毛(anchoring villus)：长入底蜕膜 中的绒毛 蜕膜板:底蜕膜表面覆盖来自固定绒毛的滋养层细...
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游离绒毛膜促性腺激素 FCG
感受细胞的远侧突含有丰富的细胞器，游离面覆盖着许多长短不等的微绒毛。
The distal processes of 'the receptor cells contain rich cytoplasmic organelles and the free surface is covered with numerous microvilli which differ in length.
细胞游离面部分微绒毛的微丝形成中心根并深入胞质。
The microfilaments of some microvilli formed core rootlets and entered into the cytoplasm.
中肠上皮细胞游离面具发达的微绒毛，前、后盲囊上皮细胞有柱状和杯状两种形态；
The free side of the epithelium cells of midgut was covered with abundant microvilli, and there were two types of cells in the epithelium of anterior and posterior midgut cecum;
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