Page 110 - The Miracle of Human Creation

THE MIRACLE OF HUMAN CREATION

Trophoblast cells separate from all
zona pellucida the other cells which form the em-
blastocyst, bryo. They are a group of cells
external which support the embryo in
view
(5 days) every detail of its development in
the mother's uterus. Because of
the balance that these cells estab-
lish between the mother and the
embryo, the development contin-
ues safely. For example, these
cells prevent pressure on the em-
blastocyst, inner cell mass bryo from the mother's blood ves-
internal sels or elements of the mother's
view
(5 days) trophoblast protective system from damaging
the baby. It is surely God Who en-
sures that these cells are aware of
what the baby needs.

the cells which form the embryo; they are a group of cells that perform all
the supportive activities relative to the embryo's development in the mot-
her's womb. On the seventh day, these cells send out projections in every
direction and begin to grow. The purpose of this change is to penetrate in-
to the wall of the uterus. During this passage, they meet the mother's blo-
od vessels and penetrate their outer surface. So, within 7-8 days, the
embryonic tissue becomes connected to the mother's blood.
Some trophoblast cells produce enzymes to destroy the membrane of
the blood vessels in the wall of the uterus. In this way, the pressure exer-
ted by the mother's blood on the embryo is lessened. The trophoblast cells
go into action as if they were aware of an immanent danger and take me-
asures to prevent anything that would result in the death of the embryo.
If these cells did not make such an adjustment in the mother's blood ves-
sels, the mother's blood would flow in under high pressure. In this situ-
ation, the blood circulation in the embryo would stop as a result of the
outside pressure of the mother's.
In subsequent weeks, a number of these special cells again form a
buffer between the embryo and the mother's blood. This buffer is called
the "placenta" which has a very particular structure. When we look clo-
sely, we see that the trophoblast cells form this buffer to act as a blood

108