placenta

noun

1. the vascular structure in the uterus of most mammals providing oxygen and nutrients for and transferring wastes from the developing fetus

2. that part of the ovary of a flowering plant where the ovules form

1. 胎盘
The placenta is the mass of veins and tissue inside the womb of a pregnant woman or animal, which the unborn baby is attached to.

e.g. The drug can be transferred to the baby via the placenta.
毒品会通过胎盘传给胎儿。

1. 胎盘：1.胎盘的结构 胎盘(placenta)是由胎儿的丛密绒毛膜与母体的基蜕膜共同组成的圆盘形结构. 足月胎儿的胎盘重约500g,直径15~20cm,中央厚,周边薄,平均厚约2.5cm. 胎盘的胎儿面光滑,表面覆有羊膜,脐带附于中央或稍偏,

2. 胎座：c 胎座(placenta)胚珠在子房内着生的部位称胎座. 常见的胎座有下列几种类型:①边缘胎座(marginal placenta)是由 l心皮构成的单室子房,胚珠沿腹缝线的边缘着生,如白扁豆、甘草等. ②侧膜胎座(parietal placenta)由合心皮雌蕊形成,

3. placenta的意思

3. 胎盤素：近年来,陆续开发出新的、安全有效的合成美白品如美拉白(Biowhite)、杜鵑花酸(Azelaic acid)等. 某些成分如果酸(Fruit acid)可通过促进角质层的代谢、胎盘素(placenta)通过活化细胞和增强色素代谢尔对美白具有辅助功效.

4. [动物]胎盘;[植物]胎座：placebo 安慰剂,空白对照剂 | placenta [动物]胎盘;[植物]胎座 | placental 胎盘的