Formation and structure of the hemodichorial chorio-allantoic placenta of the bat (Myotis lucifugus lucifugusy)†
Formation and structure of the hemodichorial chorio-allantoic placenta of the bat (Myotis lucifugus lucifugusy)†
复制标题
蝙蝠血毛绒毛膜尿囊胎盘的形成和结构（鼠鼠耳蝠）†
DOI：
10.1002/aja.1001220303
复制
发表时间：
1968
影响因子：
--
通讯作者：
W. A. Wimsatt
中科院分区：
文献类型：
--
作者：
A. Enders;W. A. Wimsatt
蝙蝠的最终绒毛膜-尿囊性胎盘是血分性的，因为细胞滋养层持续到足月。合胞体含有胞内腔隙，其中只有合胞体的一部分与母体血腔表面的薄外质层相通时才有连续的层。
The definitive chorio-allantoic placenta of the bat is hemodichorial, since the cytotrophoblast layer persists to term. The syncytium contains intrasyncytial lacunae in which there is a continuous lamina interrupted only where portions of the syncytium communicate with the thin ectoplasmic layer at the surface of the maternal blood spaces.
The future cytotrophoblast and syncytial trophoblast layers can be distinguished shortly after implantation. The future syncytial layer is not syncytial until after it invests most of the anastomotic vessels of the vascular tuft. The resulting labyrinth is converted from the vaso-chorial to the hemodichorial condition as processes of syncytium pass through the basement membrane of the maternal vessels and spread out under the endothelial cells. The basement membrane is then included within the syncytium as the intrasyncytial lamina, and the maternal endothelial cells are lost. The numerous communications of the maternal vessels with the labyrinth seen early in gestation are reduced through occlusion of many of the efferent channels, which process also contributes areas of necrosis to the decidua basalis. The peculiarity of a maternal extracellular membrane being incorporated into the fetal portion of the placenta is discussed.