- placenta - that part of the ovary of a flowering plant where the ovules form
--1 is a kind of reproductive structure
--1 is a part of ovary- placenta - the vascular structure in the uterus of most mammals providing oxygen and nutrients for and transferring wastes from the developing fetus
--2 is a kind of vascular structure
--2 is a part of uterus, womb
--2 has parts: caul, veil, embryonic membrane
--2 has particulars: afterbirth - placenta - the vascular structure in the uterus of most mammals providing oxygen and nutrients for and transferring wastes from the developing fetus