placenta

• 指被子植物中胚珠着生的结构（胎座），也指大多数哺乳动物妊娠期子宫内的血管器官（胎盘），负责为发育中的胎儿供氧、输送营养并排出废物。

A noun referring to a structure in flowering plants where ovules develop, or the vascular organ in the uterus of most mammals that supplies oxygen and nutrients to and removes waste from the developing fetus.

1. Botanical structureC1formalscientific

   The part of the ovary of a flowering plant where the ovules develop and are attached.

   胎座

   • The ovules are attached to the placenta within the ovary.
   • In some plants, the placenta is located along the ovary wall.
   • The development of seeds begins at the placenta.

2. Mammalian organB2formalmedical

   The vascular organ in the uterus of most mammals that supplies oxygen and nutrients to the developing fetus and removes waste products.

   胎盘

   • The placenta connects the mother's blood supply to the fetus.
   • After birth, the placenta is expelled from the uterus.
   • Doctors monitor the health of the placenta during pregnancy.

   同义词afterbirth