Blastocyst refers to the hollow ball of embryonic cells that enters the uterus from the Fallopian tube and eventually implants. It is a stage within the germinal period of pre-natal development in which the zygote has the form of a sphere of cells surrounding a cavity of fluid.

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Implantation at psychology-glossary.com■■■■
Implantation is the step in which the zygote burrows into the uterine wall and establishes connections . . . Read More
Embryonic disk at psychology-glossary.com■■■
Embryonic disk refers to the platelike inner part of the blastocyst that differentiates into the ectoderm . . . Read More
Germ disc at psychology-glossary.com■■■
Germ disc is defined as small cluster of cells near the center of the zygote that will eventually develop . . . Read More
CSF at psychology-glossary.com■■■
CSF is the abbreviations of Cerebrospinal fluid, a protective fluid that surrounds and supports the brain . . . Read More
Pleura at psychology-glossary.com■■■
Pleura refers to a thin lining of cells that is attached to the inside of the chest wall and to the lung; . . . Read More
Embryonic stage at psychology-glossary.com■■■
Embryonic stage is defined as the stage of pre-natal development that lasts from implantation through . . . Read More
Ball at top500.de■■■
Ball is described as a sphere; a round body of various sizes and materials, either hollow or solid. Two . . . Read More
Germinal stage at psychology-glossary.com■■■
. . . Read More
Period of the zygote at psychology-glossary.com■■■
Period of the zygote refers to the first phase of prenatal development that lasts from conception until . . . Read More
Trophoblast at psychology-glossary.com■■
Trophoblast refers to the outer part of the blastocyst from which the amniotic sac, placenta, and umbilical . . . Read More