Chorion
The chorion is one of the fetal
membranes that forms between the developing fetus and mother during pregnancy. Both chorion and endometrium
form the placenta, which is the embryo’s principal organ of respiration,
nutrition, and excretion.Chorion is covered with ectoderm, lined
with mesoderm and is separated from other embryonic membranes by the coelom. Chorion
develops a rich supply of blood vessels and forms an intimate association with
the endometrium (lining) of the mother’s uterus.
