placenta membranacea

例句：

1. 1.The placenta membranacea is a crucial part of the human pregnancy process.
   胎盘膜状物是人怀孕过程中至关重要的部分。
2. 2.During labor, the placenta membranacea plays a vital role in delivering oxygen and nutrients to the baby.
   在分娩过程中，胎盘膜状物起着至关重要的作用，为宝宝输送氧气和养分。
3. 3. The study of placenta membranacea has significant implications for understanding the development of the fetus.
   对胎盘膜状物的研究对于理解胎儿发育具有重要意义。