Examlex
What symbol is used to represent the factor 10-9?
Polyspermy
The fertilization of an egg by more than one sperm, which can lead to developmental abnormalities.
Germ Layers
Germ layers are the three primary layers of cells (ectoderm, mesoderm, and endoderm) in the early embryo that give rise to all the tissues and organs of the body during development.
Amniotic Cavity
The fluid-filled space within the amniotic sac, surrounding and protecting the developing fetus during pregnancy.
Fetus
A developing human from approximately the end of the eighth week after conception until birth.
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