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Chapter 2 PSYC 2103 Terms 2

Across
A hollowed-out area in the blastocyst from which the nervous system develops.
An organ connected to the uterine wall and the fetus by the umbilical cord. The placenta serves as a relay station between mother and fetus for the exchange of nutrients and wastes.
From head to tail.
Injection of sperm into the uterus to fertilize an ovum.
(zygotic stage): The period of development between conception and implantation of the embryo.
The sac containing the fetus.
Down
Fertilization of an ovum in a laboratory dish.
A tube that connects the fetus to the placenta.
From the inner part (or axis) of the body outward.
The stage of prenatal development that lasts from implantation through the eighth week of pregnancy; it is characterized by the development of the major organ systems.
The outer part of the blastocyst from which the amniotic sac, placenta, and umbilical cord develop.
A stage within the germinal period of prenatal development in which the zygote has the form of a sphere of cells surrounding a cavity of fluid.