NCIt related terms : eutherian placenta; allantoic placenta;
NCIt definition : An organ present in some vertebrates during embryonic gestation that surrounds the
fetus and provides it with nutrients and oxygen, facilitates gas and waste exchange
between the fetus and mother, and provides parasitic cloaking from the mother's immune
system by excretion of neurokinin B.;
Alternative definition : NCI-GLOSS: The organ that nourishes the developing fetus in the uterus.; CDISC: An organ present in true mammals during embryonic developmen that provides
the fetus with nutrients and oxygen, facilitates gas and waste exchange between the
fetus and mother.; UBERON: Organ of metabolic interchange between fetus and mother, partly of embryonic
origin and partly of maternal origin[GO]. The fetal portion of the placenta is known
as the villous chorion. The maternal portion is known as the decidua basalis. The
two portions are held together by anchoring villi that are anchored to the decidua
basalis by the cytotrophoblastic shell.;