ADDITIONAL INVESTIGATIONS ON THE ULTRASTRUCTURE OF TRICHOPLAX-ADHAERENS SCHULZE,F.E. (PLACOZOA)
ADDITIONAL INVESTIGATIONS ON THE ULTRASTRUCTURE OF TRICHOPLAX-ADHAERENS SCHULZE,F.E. (PLACOZOA)
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DOI：
10.1007/bf00310320
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发表时间：
1981-01-01
期刊：
影响因子：
1
通讯作者：
BENWITZ, G
中科院分区：
文献类型：
--
作者：
GRELL, KG;BENWITZ, G
腹侧上皮细胞不形成微绒毛，但形成有孔壁架和褶皱的海绵状网状结构，这可能在动物粘附于基质和/或食物的体外预消化中起作用。在细胞分裂过程中，典型的中心粒出现在纺锤体两极。生长中的卵细胞吞噬起滋养细胞作用的纤维细胞的突起。在相同的条件下，导致卵子形成所谓的S细胞可能会出现。一些超微结构数据表明它们是精子细胞。
The cells of the ventral epithelium form no microvilli, but a spongy meshwork of fenestrated ledges and folds which may play a role in the adhesion of the animal to the substratum and/or in the extrasomatic predigestion of the food. During cell division typical centrioles occur at the spindle poles. The growing egg cells phagocytize projections of the fiber cells which function as trophocytes. Under the same conditions leading to egg formation so-called S-cells may occur. Some ultrastructural data suggest that they are sperm cells.