包围细胞

结果表明：藏卵器外的管细胞（包围细胞或螺旋细胞）在卵细胞受精以后，不但没有钙的沉淀、加厚，而且还呈现出逐渐萎缩，最终消失。

The results show that surface tube cells ( surround cells , or spiral cells ) of oogonium , after the egg cell fertilized , not only lack calcareous deposit thickening , but also wither away gradually so that they disappear finally .

效靶细胞共育后，光镜和扫描电镜下见TDLN细胞包围瘤细胞，以伪足与瘤细胞紧密接触、粘附，二者形成花环状；

Under the microscope and scanning electron microscope , it was observed that TDLN cells were in close contact with and adhered to target cells through their microvilli and formed a special flower-ring structure .

胞外聚合物是包围在细胞膜外的物质，一般为聚糖、蛋白质、核酸、类脂、腐殖质、纤维等。通常认为胞外聚合物是具有粘性的物质，对污泥的絮凝和沉降有很重要的作用。

Extracellular polymers ( ECPs ) are materials enclosed the cell membrane , including polysaccharides , protein , nucleic acids , lipoid , humus , fibre , etc.

第三阶段：卵母细胞体积变大，滤泡细胞呈单层均匀包围卵母细胞。

Oocyte become bigger in size and the monolayer follicle cells uniformly encircle the oocyte .

滤泡细胞开始包围卵母细胞。

Follicle cells begin to surround oocyte .

绒毡层：维管植物花粉囊内包围孢子母细胞的富含营养物质的一层结构。

Tapetum ( pl. tapeta ) A food-rich layer surrounding the spore mother cells in the anthers of vascular plants .

第3阶段，滤泡细胞包围卵母细胞后成为双核的柱状体；

The oocyte is surrounded by the follicular cells which form a single-layer and then the follicular cells become columnar shape with two nucleus .

这些肿瘤细胞产生了一整系列的蛋白酶，能降解包围它们的细胞外基质蛋白，这也是部分的基底膜。

The tumor cells produce a whole range of proteases that degrade the proteins of the extracellular matrix that hems them in , part of which is the basement membrane .

次级卵泡由4层以上的卵泡细胞包围卵母细胞，卵泡细胞间开始有大小不等的囊腔，卵泡膜更加明显，卵泡的平均直径是284.59μm，卵母细胞的平均直径是85.13μm；

Oocyte of secondary follicle was surrounded by over four layers of follicle cells . There were some lacunae and spaces between follicle cells and follicular theca was clearer . The average diameter of secondary follicle and the oocyte were 284.59 μ m and 85.13 μ m.

常见1～3个卵泡上皮细胞包围的卵母细胞形成原始卵泡；

The primary follicle often consists of 1 - 3 follicular cells .