The embryo attaches to the placenta when it reaches the uterus very early in a pregnancy.
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∙ 2014-11-20 21:36:03placenta
Placenta
The Placenta.
The chorion is the outer membrane surrounding the embryo that is continuous with the placenta, the highly vascular structure that acts as a physical communication between the mother and the embryo.
A mammalian embryo gets oxygen and nutrients from it mother by means of the umbilical cord which extends the embryonic blood supply into the placenta embedded in the mothers womb. The blood supply in the placenta is close to that of the mother and oxygen and nutrients diffuse across from the mother to the baby. With egg laying animals the nutrients are supply to the embryo as the yolk part of the egg and oxygen is supplied by diffusion through the permeable shell and shell membrane
The egg does not attach to the placenta. The egg implants into the wall of the uterus and grows to form the embryo and later the fetus and placenta (around twelve weeks)
the embryo attaches to the placenta.
The umbilical cord connects to the Placenta once it is in form to attach
PLACENTA
placenta
It nourishes the embryo
It nourishes the embryo
It nourishes the embryo.
Placenta.
Placenta (Apex)
The placenta provides oxygen and food to the growing embryo.
The embryo and placenta grow side by side and are attached via the umbilical cord - the placenta attaches to the uterine wall as it develops after the embryo implants in the uterine lining. Some women have spotting and slight cramps when the embryo attaches to the uterine lining.